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Polyphenols are a large, naturally occurring family of compounds found in plants — think the pigments, tannins and bitters that give fruits, vegetables, tea, coffee, chocolate and wine their color and flavor. Chemically diverse (groups include flavonoids like flavanols and anthocyanins, phenolic acids, stilbenes such as resveratrol, and lignans), polyphenols are not a single nutrient but a broad class of molecules that interact with our bodies in many ways. Their health effects come from a mix of direct biochemical activity and indirect influences mediated by digestion, metabolism and the gut microbiome.

One of the most widely discussed actions of polyphenols is antioxidant activity. In laboratory conditions they can neutralize reactive oxygen species and reduce oxidative damage to cells and biomolecules. In the human body the effect is more complex: many polyphenols are metabolized quickly and their circulating concentrations are low, so much of the beneficial activity appears to come from signaling effects — they influence cellular pathways that control inflammation, stress responses, and gene expression — rather than simply “mopping up” free radicals. Through these signaling roles, polyphenols can help reduce chronic, low-grade inflammation that contributes to cardiovascular disease, some metabolic disorders and age-related tissue damage.

Cardiovascular benefits are among the most consistently observed: polyphenol-rich diets (for example Mediterranean-style diets high in olive oil, nuts, fruits and vegetables) are associated with lower risks of heart disease. Mechanisms proposed include improved endothelial function (better blood-vessel dilation), reduced oxidation of LDL cholesterol, modest improvements in blood pressure and favorable effects on platelet function and blood lipids. Similarly, observational studies link higher polyphenol intake with lower risks of type 2 diabetes and metabolic syndrome, possibly through improved insulin sensitivity and reduced inflammatory signaling, though controlled trial results can be mixed depending on the compound, dose and population studied.

Polyphenols also interact strongly with the gut microbiota. Many polyphenols are poorly absorbed in the small intestine and reach the colon, where bacteria break them down into smaller metabolites. Those microbial metabolites often have biological activities of their own, and the interaction is two-way: polyphenols can alter the composition and function of the gut microbiome, potentially promoting beneficial bacterial strains. This gut-mediated pathway is increasingly recognized as an important route through which polyphenols influence metabolic health, immune function and even brain-related processes.

There is growing — though still evolving — evidence for neuroprotective effects. Certain polyphenols can modulate signaling pathways linked to neuronal survival, reduce neuroinflammation and improve cognitive function in animal models and some human trials. Epidemiological data suggest diets rich in polyphenol-containing foods correlate with slower cognitive decline, but causality and the optimal types or amounts remain under investigation.

Important caveats apply. Bioavailability varies widely between compounds: some are rapidly absorbed and modified; others are poorly absorbed and rely on microbial conversion. Food matrix and food preparation (raw vs cooked, whole fruit vs juice, presence of fat) influence absorption and effect. Because of this complexity, whole foods are generally preferred to isolated, high-dose supplements. Very high supplemental doses can cause adverse effects in some cases and may interfere with the absorption of non-heme iron; polyphenols can also influence drug-metabolizing enzymes and thus interact with medicines in certain situations. Finally, while many studies are promising, evidence strength varies by outcome — observational associations are common, but randomized controlled trials sometimes show smaller or inconsistent benefits.

In practice, the safest and most evidence-aligned approach is to obtain polyphenols through a varied plant-forward diet: colorful fruits and vegetables, berries, tea and coffee in moderation, cocoa or dark chocolate, nuts, whole grains, legumes, and extra-virgin olive oil provide a broad spectrum of polyphenols within a healthy dietary pattern. They’re not a magic bullet, but as part of an overall balanced diet and healthy lifestyle they contribute to reducing chronic inflammation, supporting vascular and metabolic health, nourishing the gut microbiome and potentially protecting brain health over the long term.

(Source : ChatGPT)

Oolong tea does appear to have healthful properties, although the strength of the evidence varies by outcome and much of the best mechanistic work comes from lab or animal studies rather than large, definitive human trials. At the chemical level, oolong is made from the same plant as green and black tea (Camellia sinensis) but is partially oxidized, which gives it a mix of polyphenols, catechins and theaflavins. These compounds act as antioxidants and mild anti-inflammatory agents; they can neutralize free radicals and influence metabolic and cellular pathways in ways that plausibly protect tissues from damage. Laboratory analyses and reviews of oolong’s phytochemistry describe this rich polyphenol profile and the tea’s measurable antioxidant activity. (PMC)

Because of those antioxidant and bioactive compounds, observational studies and some clinical research link regular tea drinking — including oolong — with lower risk markers for heart disease. People who drink moderate amounts of tea have been found, in population studies, to have lower rates of death from cardiovascular causes and better blood-lipid profiles; smaller trial data and animal work also hint that tea polyphenols can improve vascular function and reduce cholesterol and triglycerides. These associations don’t prove causation (tea drinkers may differ from non-drinkers in other healthy behaviors), but the pattern of observational findings plus plausible mechanisms makes a cardiovascular benefit one of the more consistent and credible claims. (The Nutrition Source)

Oolong is often discussed for its effects on weight and metabolism. Some trials and animal studies report modest decreases in body fat and improvements in markers of lipid metabolism after regular oolong consumption or supplementation with oolong extracts; caffeine plus certain tea polyphenols can slightly increase energy expenditure and fat oxidation, which may help with weight control when combined with diet and exercise. The human studies are usually small and short, so any weight effects should be seen as potentially helpful but not dramatic or guaranteed. (PubMed)

The picture is mixed for blood sugar and diabetes. Several large observational studies and meta-analyses find that regular tea drinking (especially when averaged across tea types) is associated with a lower risk of type 2 diabetes, but studies focused specifically on oolong have produced inconsistent results — a few reported no benefit and at least one older study even reported a higher diabetes risk in a subgroup of heavy oolong drinkers, though that finding has not been universally replicated and may reflect confounding or regional differences in preparation and lifestyle. Overall, tea may help glucose metabolism for some people, but the evidence for oolong specifically is variable and more research is needed. (PMC)

Beyond those areas, animal and lab studies suggest oolong polyphenols might support cognitive function, influence the gut microbiome, and show anti-cancer or bone-protective effects in early experiments, but human data are preliminary. There are also practical cautions: oolong contains caffeine (less than coffee but enough to matter for sensitive people), tea can reduce absorption of non-heme iron when consumed with iron-rich plant foods, and very large amounts of any tea can add fluoride or interact with medications. For most people, moderate oolong intake (a few cups a day) is a low-calorie, antioxidant-rich choice that can be part of a healthy diet, while pregnant people, those with iron-deficiency, or people sensitive to caffeine should moderate intake and consult their clinician if unsure. (ScienceDirect)

In short, oolong tea brings antioxidant and polyphenol-driven effects that plausibly support heart and metabolic health and may modestly aid weight control; many findings are promising but not definitive, so think of oolong as a healthy beverage choice rather than a cure-all.

(Source : ChatGPT)

Intense, short bursts of exercise often stop annoying spasms because they change your body chemistry and your nervous system’s “setting” — they boost blood flow, raise body temperature, release endorphins and other inhibitory signals, and temporarily raise the threshold nerves need to fire, so small, annoying twitches get silenced. A long, low-intensity walk does something different: it can slowly fatigue muscles, shift blood flow, and — if you get a little dehydrated or lose electrolytes — actually make nerves more likely to fire. Posture and repetitive head/neck movement during a long walk can also irritate the same nerve pathways that trigger the ear spasms. 

Practical bits: stay hydrated, keep electrolytes balanced, avoid anything that reliably triggers the spasms, try gentle neck/jaw stretches, and if the problem continues see an ENT or neurologist.

When a brief, intense burst of exercise stops an annoying spasm but a long, gentle walk lets it come back, several biological processes are working together — some that calm nerve activity quickly, and others that can make nerves more likely to fire if the activity is prolonged or tiring. To understand this, it helps to separate the short-term “reset” effects of hard exercise from the slower, fatigue- and posture-related effects of long low-intensity activity.

A short, vigorous workout activates fast, powerful control systems in your brain and spinal cord that temporarily turn down peripheral nerve and muscle activity. During intense exercise the brain releases natural chemicals — endorphins and other neuromodulators such as serotonin and norepinephrine — and these substances help engage descending inhibitory pathways from the brainstem. Those pathways act like a dimmer switch on incoming signals, reducing how strongly sensory and motor circuits respond. At the same time your body increases blood flow and raises local temperature, which helps clear irritant molecules and metabolites around nerves and muscles; that cleanup reduces the likelihood of spontaneous, ectopic firing. The combined result is a short-term rise in the threshold nerves need to reach before they fire, so small twitches and spasms are silenced. There’s also an attentional effect: hard exercise strongly distracts the brain, which reduces awareness and monitoring of small internal sensations, making spasms feel less intrusive.

A long, low-intensity walk, however, produces a different internal environment. Because the activity is prolonged, muscles may slowly fatigue and local metabolism shifts. Electrolytes such as sodium, potassium and magnesium can be lost through sweating or diluted by changes in fluid balance, and small changes in those ions make muscle and nerve membranes more excitable. Prolonged repetitive motion or a fixed head/neck posture during a walk can also mechanically irritate nerves or the small muscles and joints around the jaw and ear, providing a steady, low-level input that reinforces the twitching circuits instead of shutting them down. In other words, the protective “dimmer” that intense exercise brings is weaker during long gentle activity, while drivers of excitability (fatigue, electrolyte shifts, persistent sensory input) have more time to build up.

A third layer is how the nervous system learns from repeated input. Repeated or ongoing stimulation — even if each pulse is small — can induce short-term plastic changes in synapses and membrane properties that make circuits more likely to respond in the future. So if a long walk repeatedly triggers the same neck posture or muscle use, the reflex loops that cause the ear spasm can be reinforced. Psychological factors also matter: low-intensity activity often leaves you more aware and relaxed, which can paradoxically make you notice small noises or twitches again once the short-term biochemical “reset” of intense exercise wears off.

In practice this means the same person can get quick relief from a hard, short workout (because it engages inhibitory brain pathways, raises blood flow, and distracts attention) yet see a return of symptoms after long, repetitive, or dehydrating activity (because of fatigue, electrolyte changes, posture-related nerve irritation, and reinforced reflex loops). Addressing the problem therefore combines immediate self-care — hydration, electrolyte balance, gentle warming and massage, breaks from repetitive posture — with stopping whatever electrical stimulation originally triggered the sensitivity and, if needed, getting medical evaluation for targeted treatments.

All of these mechanisms are natural and well-studied: the body’s chemical signals, circulation, membrane ion balances, mechanical irritation, and nervous-system plasticity interact to raise or lower how easily nerves and muscles fire. That interaction explains why an intense short burst of exercise can feel curative in the moment while a long, low-intensity activity can allow the twitching to return.

Why electrolytes matter :

Electrolytes matter for your ear spasm because they’re the tiny charged particles that make nerves and muscles work. Nerve cells keep different amounts of sodium, potassium, calcium and magnesium inside and outside their membranes, and that balance sets the cell’s resting voltage and how easily it will fire. Even a small change in those concentrations shifts the resting voltage or the firing threshold, so nerves that were quiet can start firing spontaneously or become much easier to trigger. (NCBI)

Potassium and sodium control the main up-and-down phases of the nerve’s electrical pulse: sodium entry helps start a pulse, potassium leaving helps stop it. If those ion levels change, the timing and ease of nerve firing change too, which can produce twitching, cramps, or ectopic (abnormal) discharges. Calcium is key at nerve endings for releasing neurotransmitters and for muscle contraction, so shifts in calcium can make muscles contract more readily. Magnesium plays a special stabilizing role: it helps modulate ion channels and prevents excessive excitability in both nerves and muscles, so low magnesium is often linked to more spasms and cramps. (Wiley Online Library)

During exercise, long walks, heavy sweating, or even drinking a lot of plain water after dehydration, the balance of these electrolytes and the overall blood and tissue fluid volumes can change. Losing sodium, potassium, or magnesium in sweat or diluting them by overdrinking can reduce the extracellular concentrations the nerves “see,” and that change can make nerves and muscles electrically unstable — in other words, more likely to twitch or produce ongoing spasms. That same physiology is a common explanation for exercise-associated muscle cramps and similar hyperexcitability problems. (PMC)

Finally, a nerve that has already been irritated (for example by repeated electrical stimulation) is more vulnerable: the same small electrolyte shift that wouldn’t bother a normal nerve can push an already-hyperexcitable nerve into spontaneous firing. In the ear this can show up as persistent middle-ear muscle contractions or myoclonus, because the tiny muscles and nerves there are sensitive to both electrical and chemical (electrolyte) changes. (PMC)

In short: electrolytes set the electrical behavior of nerves and muscles; sweating, fluid shifts, or dilution change those electrolyte levels; and those changes can make already-sensitive nerves fire more easily — which is how electrolyte shifts can be linked to recurring ear spasms. (NCBI)

(Source : ChatGPT)

Patients undergoing chemotherapy often experience cognitive effects such as memory impairment and difficulty concentrating — a condition commonly known as “chemo brain.”

MIT researchers have now shown that a noninvasive treatment that stimulates gamma frequency brain waves may hold promise for treating chemo brain. In a study of mice, they found that daily exposure to light and sound with a frequency of 40 hertz protected brain cells from chemotherapy-induced damage. The treatment also helped to prevent memory loss and impairment of other cognitive functions.
This treatment, which was originally developed as a way to treat Alzheimer’s disease, appears to have widespread effects that could help with a variety of neurological disorders, the researchers say.
“The treatment can reduce DNA damage, reduce inflammation, and increase the number of oligodendrocytes, which are the cells that produce myelin surrounding the axons,” says Li-Huei Tsai, director of MIT’s Picower Institute for Learning and Memory and the Picower Professor in the MIT Department of Brain and Cognitive Sciences. “We also found that this treatment improved learning and memory, and enhanced executive function in the animals.” Tsai is the senior author of the new study, which appears today in Science Translational Medicine. The paper’s lead author is TaeHyun Kim, an MIT postdoc.

Protective brain waves

Several years ago, Tsai and her colleagues began exploring the use of light flickering at 40 hertz (cycles per second) as a way to improve the cognitive symptoms of Alzheimer’s disease. Previous work had suggested that Alzheimer’s patients have impaired gamma oscillations — brain waves that range from 25 to 80 hertz (cycles per second) and are believed to contribute to brain functions such as attention, perception, and memory. Tsai’s studies in mice have found that exposure to light flickering at 40 hertz or sounds with a pitch of 40 hertz can stimulate gamma waves in the brain, which has many protective effects, including preventing the formation of amyloid beta plaques. Using light and sound together provides even more significant protection. The treatment also appears promising in humans: Phase 1 clinical trials in people with early-stage Alzheimer’s disease have found the treatment is safe and does offer some neurological and behavioral benefits. In the new study, the researchers set out to see whether this treatment could also counteract the cognitive effects of chemotherapy treatment. Research has shown that these drugs can induce inflammation in the brain, as well as other detrimental effects such as loss of white matter — the networks of nerve fibers that help different parts of the brain communicate with each other. Chemotherapy drugs also promote loss of myelin, the protective fatty coating that allows neurons to propagate electrical signals. Many of these effects are also seen in the brains of people with Alzheimer’s.

“Chemo brain caught our attention because it is extremely common, and there is quite a lot of research on what the brain is like following chemotherapy treatment,” Tsai says. “From our previous work, we know that this gamma sensory stimulation has anti-inflammatory effects, so we decided to use the chemo brain model to test whether sensory gamma stimulation can be beneficial.”

As an experimental model, the researchers used mice that were given cisplatin, a chemotherapy drug often used to treat testicular, ovarian, and other cancers. The mice were given cisplatin for five days, then taken off of it for five days, then on again for five days. One group received chemotherapy only, while another group was also given 40-hertz light and sound therapy every day.

After three weeks, mice that received cisplatin but not gamma therapy showed many of the expected effects of chemotherapy: brain volume shrinkage, DNA damage, demyelination, and inflammation. These mice also had reduced populations of oligodendrocytes, the brain cells responsible for producing myelin.
However, mice that received gamma therapy along with cisplatin treatment showed significant reductions in all of those symptoms. The gamma therapy also had beneficial effects on behavior: Mice that received the therapy performed much better on tests designed to measure memory and executive function.

“A fundamental mechanism”

Using single-cell RNA sequencing, the researchers analyzed the gene expression changes that occurred in mice that received the gamma treatment. They found that in those mice, inflammation-linked genes and genes that trigger cell death were suppressed, especially in oligodendrocytes, the cells responsible for producing myelin. In mice that received gamma treatment along with cisplatin, some of the beneficial effects could still be seen up to four months later. However, the gamma treatment was much less effective if it was started three months after the chemotherapy ended. The researchers also showed that the gamma treatment improved the signs of chemo brain in mice that received a different chemotherapy drug, methotrexate, which is used to treat breast, lung, and other types of cancer.

“I think this is a very fundamental mechanism to improve myelination and to promote the integrity of oligodendrocytes. It seems that it’s not specific to the agent that induces demyelination, be it chemotherapy or another source of demyelination,” Tsai says.

Because of its widespread effects, Tsai’s lab is also testing gamma treatment in mouse models of other neurological diseases, including Parkinson’s disease and multiple sclerosis. Cognito Therapeutics, a company founded by Tsai and MIT Professor Edward Boyden, has finished a phase 2 trial of gamma therapy in Alzheimer’s patients, and plans to begin a phase 3 trial this year. “My lab’s major focus now, in terms of clinical application, is Alzheimer’s; but hopefully we can test this approach for a few other indications, too,” Tsai says. The research was funded by the JPB Foundation, the Ko Hahn Seed Fund, and the National Institutes of Health.

(Source : MITNews)

Forty hertz (40 Hz) is a rhythm — a pulse that repeats 40 times every second. When the brain or body is exposed to a 40 Hz rhythm (by gentle sound, light, touch, or weak electrical stimulation), a few things can happen that may help the body and overall health.

First, 40 Hz can make you feel more alert and focused for a short time. That’s because it nudges certain brain circuits that help attention and short-term memory, so people often notice they can concentrate a bit better right after stimulation. Second, in many animal studies 40 Hz seems to wake up the brain’s cleanup cells (microglia) so they move more and clear away waste and sticky protein clumps. By helping clear waste, this could protect brain cells from slow damage over time — which is why scientists are excited about possible benefits for brain aging, although in people the evidence is still very limited. Third, 40 Hz can change chemical signals in the brain (small messenger molecules and genes) that reduce long-term inflammation and promote repair; because the brain talks to the rest of the body through nerves and hormones, these shifts can sometimes lower inflammation outside the brain too. Fourth, rhythm-based stimulation can influence the autonomic nervous system (the body’s “automatic” control for heart, digestion, breathing), which may help with stress, heart-rate patterns, and digestion for some people.

Those are the hopeful benefits: short boosts in attention, possible support for brain cleanup and reduced inflammation, and secondary improvements in stress and bodily functions through nerve and hormone pathways. Important to know: most strong results are from animal or lab work; human studies are small and preliminary. Also, some methods (very loud sounds, flashing lights) can be unsafe for people with hearing issues or photosensitive epilepsy. In short, 40 Hz is promising for brief mental boosts and potential brain-protective effects, but it’s not a proven medical treatment yet — it’s best seen as an interesting tool that might complement good sleep, exercise, and medical care, not replace them.

When I say “the brain talks to the rest of the body through nerves and hormones,” I mean there are two main communication systems the brain uses: fast electrical wiring (nerves) and slower chemical mail (hormones). A 40 Hz rhythm changes how groups of brain cells fire together, and those changes ripple out through these two channels.

Nerve signals are like electrical telephone wires. Certain brain cells send rapid bursts down long nerve fibers to organs — for example, the vagus nerve carries instructions from the brain to the heart, lungs, gut and immune tissues. If 40 Hz stimulation makes those brain cells fire in a new pattern, the signal traveling down the nerve changes too. That can shift heart rate, digestion, and the activity of immune cells sitting near those organs almost immediately.

Hormones work more like postal delivery. The brain can tell glands (like the adrenal glands) to release hormones into the blood. Those hormones spread through the whole body and change how distant cells behave — raising or lowering inflammation, changing energy use, or altering stress responses. A change in brain activity at 40 Hz can alter the brain’s hormonal commands, so the body’s overall chemical environment shifts over minutes to hours.

There’s also a third route that sits between nerves and hormones: immune signaling. Brain activity can change the balance of chemical messengers called cytokines inside the brain, and some of these messages affect immune cells nearby or trigger signals that travel out to the body. Conversely, nerves like the vagus can tell immune tissues to calm down or ramp up. So by changing brain rhythms, you can modify this neuro-immune conversation and indirectly change immune activity in the body.

Finally, the timing matters. A coordinated 40 Hz pattern forces many neurons to act together instead of firing at random. That coordinated firing is more effective at sending clear instructions down nerves, prompting glands, and organizing immune-related signals. In short: 40 Hz changes the brain’s activity pattern, and because the brain controls organs and the immune system through nerves, hormones and immune messengers, those brain changes can produce measurable effects throughout the body.

Here’s a clearer picture of what “indirectly change immune activity in the body” can mean, in plain language.

When brain activity shifts (for example because of 40 Hz stimulation), that change can travel out of the skull in three main ways and each one can alter immune behavior elsewhere in the body. The fastest route is nerves: the brain sends electric signals down big nerves like the vagus. Those nerve signals tell organs and immune tissues to calm down or ramp up. For example, vagus nerve activity can trigger a “cholinergic anti-inflammatory” response that tells immune cells to make fewer inflammatory messengers, so levels of things like TNF or IL-6 can fall within minutes to hours.

A second route is hormones. Brain activity controls hormone glands (the hypothalamus → pituitary → adrenal chain). If that control changes, the body releases different amounts of hormones such as cortisol. Cortisol circulates in the blood and tells many immune cells to slow their activity, change what proteins they make, and move less aggressively into tissues. Hormonal effects are slower than nerve effects (typically hours) but act broadly throughout the body.

The third route is immune signaling itself. The brain can change the mix of small chemical messengers (cytokines and chemokines) locally, and those signals either feed into the nerve/hormone systems or are carried to the blood and lymph where they shift immune cell behavior. That can change which genes are turned on inside immune cells, alter how sticky they are to blood vessels (so they enter tissues more or less), and change whether they produce inflammatory or anti-inflammatory substances. Over days this can lead to different numbers or types of immune cells sitting in tissues.

Put simply: these three pathways mean 40 Hz brain changes could make immune cells produce fewer inflammatory chemicals, move differently through the body, or behave in a calmer, “cleanup” mode rather than an aggressive, inflammatory one. The timing differs — nerve effects can be quick, hormones take longer, and gene-expression or cell-composition changes take the longest. Also, responses vary by person and context (stress, illness, medications).

Important caveat: most clear evidence for these chains of events comes from animal and lab studies; human results are preliminary. So while the mechanisms above are real biological routes, how strong or useful these changes are in people is still being worked out.

Because 40 Hz mainly changes brain activity, the kinds of body-wide immune problems it could plausibly help are those driven by too much inflammation — especially diseases where calming inflammatory signals makes a real clinical difference. In plain language, the strongest candidates are conditions like rheumatoid arthritis and inflammatory bowel disease, because we already have both animal data and early human work showing that changing brain activity (via nerves such as the vagus, or via sensory 40 Hz entrainment) can lower inflammatory chemicals in the body and calm immune cells. (PMC)

Here’s how that would work: 40 Hz stimulation can push the brain to send different patterns down major nerves (for example the vagus nerve), and that nerve pathway is known to trigger a “cholinergic anti-inflammatory” response that reduces key inflammatory messengers like TNF and IL-6. That same nerve/hormone route is why implanted or noninvasive vagus-nerve stimulation has been tested in rheumatoid arthritis and inflammatory bowel disease with some promising early results. (physoc.onlinelibrary.wiley.com)

Animal and lab studies that used sensory 40 Hz (light or sound) also reported lower inflammatory signals in brain tissue and shifts in cytokines that can travel into the blood or change how immune cells behave in the body. Those findings make it biologically plausible that 40 Hz could help other inflammatory problems too (for example some post-stroke inflammation or systemic inflammation related to aging), but evidence in people is still small. (PMC)

It’s important to be realistic: most of the strongest, mechanistic results come from animals or from studies of nerve stimulation rather than large, definitive clinical trials. That means 40 Hz approaches are promising for inflammatory diseases but not yet established medical treatments — more and bigger human trials are needed to prove benefit, find the best dosing, and check safety. If someone is considering trying 40 Hz (or a vagus-stimulation device) for an inflammatory disease, they should discuss it with their doctor and not stop proven medications. (PLOS)

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When the MIT article says 40 Hz stimulation produces “changes in immune system activity,” it’s talking mainly about effects on the brain’s immune cells and the signals that control them — not a general immune-system overhaul. In animal and lab studies, driving the brain at the gamma frequency (about 40 cycles per second) makes microglia, the brain’s resident immune/cleanup cells, change their shape and behaviour so they become more likely to move toward, surround, and engulf (phagocytose) harmful material such as amyloid plaques. Those microglial changes were first reported in a key mouse study and are one of the clearest immune-type responses seen after 40 Hz stimulation. (Nature)

Along with the microglial activation, researchers have measured shifts in immune signaling molecules (cytokines and growth factors) in the brain after 40 Hz stimulation. Some cytokines that recruit or support microglia go up, and gene-expression patterns linked to immune activity change — in short, the local chemical “calls” that tell immune cells what to do are altered, which helps explain why microglia become more phagocytic and why protein clearance can increase. Studies also suggest 40 Hz stimulation can interact with clearance pathways (like glymphatic flow) and with neuronal release of peptides that further promote removal of pathological proteins. (PMC)

It’s important to stress nuance: these immune changes are best documented in mice and in cell experiments, and the pattern of changes is complex — sometimes some inflammatory markers rise briefly (which can be part of a healthy cleanup response) while longer-term measures of chronic inflammation fall or tissue pathology improves. Human trials so far are small and preliminary, so we don’t yet know how reliably these immune effects translate to people or whether they are always beneficial. In short, “changes in immune system activity” means measurable shifts in microglial behaviour and immune signaling in the brain that tend to promote clearance of pathological proteins in animal models — but the full picture and clinical relevance for humans remain under active study. (alz-journals.onlinelibrary.wiley.com)

In plain terms, saying 40 Hz causes “cellular and molecular changes” means it makes certain brain cells act differently and shifts the chemical signals those cells use to talk to each other. One clear effect is on microglia — the brain’s cleanup crew. After repeated 40 Hz stimulation they change shape, become more active, move toward problem areas (like sticky protein clumps) and “eat” or clear away debris more than before.

At the chemical level, 40 Hz can change which genes are turned on or off in brain tissue and it alters levels of signaling molecules (the cytokines and growth factors) that tell microglia and other cells how to behave. Those changing signals help explain why microglia switch into a cleanup mode. Certain fast-firing brain cells also change how they fire and release signals, and that altered neuronal activity appears to coordinate with the immune response and with the brain’s fluid-clearance systems (think of it like improving the brain’s plumbing so waste is carried away more efficiently).

Researchers have also seen changes in the systems that tag unwanted material for removal, so the balance shifts toward a short, helpful cleanup instead of long-lasting harmful inflammation. Most of these findings come from animal and lab studies; human evidence is still limited, so we don’t yet know how big or lasting these effects are in people.

(Source : ChatGPT)

Researchers survey a broadening landscape of studies showing what’s known, and what remains to be found, about the therapeutic potential of noninvasive sensory, electrical, or magnetic stimulation of gamma brain rhythms.

A surprising MIT study published in Nature at the end of 2016 helped to spur interest in the possibility that light flickering at the frequency of a particular gamma-band brain rhythm could produce meaningful therapeutic effects for people with Alzheimer’s disease. In a new review paper in the Journal of Internal Medicine, the lab that led those studies takes stock of what a growing number of scientists worldwide have been finding out since then in dozens of clinical and lab benchtop studies.

Brain rhythms (also called brain “waves” or “oscillations”) arise from the synchronized network activity of brain cells and circuits as they coordinate to enable brain functions such as perception or cognition. Lower-range gamma-frequency rhythms, those around 40 cycles a second, or hertz (Hz), are particularly important for memory processes, and MIT’s research has shown that they are also associated with specific changes at the cellular and molecular level. The 2016 study and many others since then have produced evidence, initially in animals and more recently in humans, that various noninvasive means of enhancing the power and synchrony of 40Hz gamma rhythms helps to reduce Alzheimer’s pathology and its consequences.

“What started in 2016 with optogenetic and visual stimulation in mice has expanded to a multitude of stimulation paradigms, a wide range of human clinical studies with promising results, and is narrowing in on the mechanisms underlying this phenomenon,” write the authors including Li-Huei Tsai, Picower Professor in The Picower Institute for Learning and Memory and the Department of Brain and Cognitive Sciences at MIT.

Though the number of studies and methods has increased and the data have typically suggested beneficial clinical effects, the article’s authors also clearly caution that the clinical evidence remains preliminary and that animal studies intended to discern how the approach works have been instructive, but not definitive.

“Research into the clinical potential of these interventions is still in its nascent stages,” the researchers, led by MIT postdoc Cristina Blanco-Duque, write in introducing the review. “The precise mechanisms underpinning the beneficial effects of gamma stimulation in Alzheimer’s disease are not yet fully elucidated, but preclinical studies have provided relevant insights.”

Preliminarily promising

The authors list and summarize results from 16 clinical studies published over the last several years. These employ gamma-frequency sensory stimulation (e.g., exposure to light, sound, tactile vibration, or a combination); transcranial alternating current stimulation (tACS), in which a brain region is stimulated via scalp electrodes; or transcranial magnetic stimulation (TMS), in which electric currents are induced in a brain region using magnetic fields. The studies also vary in their sample size, design, duration, and in what effects they assessed. Some of the sensory studies using light have tested different colors and different exact frequencies. And while some studies show that sensory stimulation appears to affect multiple regions in the brain, tACS and TMS are more regionally focused (though those brain regions still connect and interact with others).

Given the variances, the clinical studies taken together offer a blend of uneven but encouraging evidence, the authors write. Across clinical studies involving patients with Alzheimer’s disease, sensory stimulation has proven safe and well-tolerated. Multiple sensory studies have measured increases in gamma power and brain network connectivity. Sensory studies have also reported improvements in memory and/or cognition, as well as sleep. Some have yielded apparent physiological benefits such as reduction of brain atrophy, in one case, and changes in immune system activity in another. So far, sensory studies have not shown reductions in Alzheimer’s hallmark proteins, amyloid or tau.

Clinical studies stimulating 40Hz rhythms using tACS, ranging in sample size from only one to as many as 60, are the most numerous so far, and many have shown similar benefits. Most report benefits to cognition, executive function, and/or memory (depending sometimes on the brain region stimulated), and some have assessed that benefits endure even after treatment concludes. Some have shown effects on measures of tau and amyloid, blood flow, neuromodulatory chemical activity, or immune activity. Finally, a 40Hz stimulation clinical study using TMS in 37 patients found improvements in cognition, prevention of brain atrophy, and increased brain connectivity.

“The most important test for gamma stimulation is without a doubt whether it is safe and beneficial for patients,” the authors write. “So far, results from several small trials on sensory gamma stimulation suggest that it is safe, evokes rhythmic EEG brain responses, and there are promising signs for AD [Alzheimer's disease] symptoms and pathology. Similarly, studies on transcranial stimulation report the potential to benefit memory and global cognitive function even beyond the end of treatment.”

Studying underlying mechanisms

In parallel, dozens more studies have shown significant benefits in mice including reductions in amyloid and tau, preservation of brain tissue, and improvements in memory. But animal studies also have offered researchers a window into the cellular and molecular mechanisms by which gamma stimulation might have these effects.

Before MIT’s original studies in 2016 and 2019, researchers had not attributed molecular changes in brain cells to changes in brain rhythms, but those and other studies have now shown that they affect not only the molecular state of neurons, but also the brain’s microglia immune cells, astrocyte cells that play key roles in regulating circulation, and indeed the brain’s vasculature system. A hypothesis of Tsai’s lab right now is that sensory gamma stimulation might promote the clearance of amyloid and tau via increased circulatory activity of brain fluids.

A hotly debated aspect of gamma stimulation is how it affects the electrical activity of neurons, and how pervasively. Studies indicate that inhibitory “interneurons” are especially affected, though, offering a clue about how increased gamma activity, and its physiological effects, might propagate.

“The field has generated tantalizing leads on how gamma stimulation may translate into beneficial effects on the cellular and molecular level,” the authors write.

Gamma going forward

As the authors make clear that more definitive clinical studies are needed, they note that at the moment, there are now 15 new clinical studies of gamma stimulation underway. Among these is a phase 3 clinical trial by the company Cognito Therapeutics, which has licensed MIT’s technology. That study plans to enroll hundreds of participants.

Meanwhile, some recent or new clinical and preclinical studies have begun looking at whether gamma stimulation may be applicable to neurological disorders other than Alzheimer’s, including stroke or Down syndrome. In experiments with mouse models, for example, an MIT team has been testing gamma stimulation’s potential to help with cognitive effects of chemotherapy, or “chemobrain.”

“Larger clinical studies are required to ascertain the long-term benefits of gamma stimulation,” the authors conclude. “In animal models the focus should be on delineating the mechanism of gamma stimulation and providing further proof of principle studies on what other applications gamma stimulation may have.”

In addition to Tsai and Blanco-Duque, the paper’s other authors are Diane Chan, Martin Kahn, and Mitch Murdock.

(Source : MITNews)

Early-stage trials in Alzheimer’s disease patients and studies in mouse models of the disease have suggested positive impacts on pathology and symptoms from exposure to light and sound presented at the “gamma” band frequency of 40 hertz (Hz). A new study zeroes in on how 40Hz sensory stimulation helps to sustain an essential process in which the signal-sending branches of neurons, called axons, are wrapped in a fatty insulation called myelin. Often called the brain’s “white matter,” myelin protects axons and insures better electrical signal transmission in brain circuits.

“Previous publications from our lab have mainly focused on neuronal protection,” says Li-Huei Tsai, Picower Professor in The Picower Institute for Learning and Memory and the Department of Brain and Cognitive Sciences at MIT and senior author of the new open-access study in Nature Communications. Tsai also leads MIT’s Aging Brain Initiative. “But this study shows that it’s not just the gray matter, but also the white matter that’s protected by this method.”

This year Cognito Therapeutics, the spinoff company that licensed MIT’s sensory stimulation technology, published phase II human trial results in the Journal of Alzheimer’s Disease indicating that 40Hz light and sound stimulation significantly slowed the loss of myelin in volunteers with Alzheimer’s. Also this year, Tsai’s lab published a study showing that gamma sensory stimulation helped mice withstand neurological effects of chemotherapy medicines, including by preserving myelin. In the new study, members of Tsai’s lab led by former postdoc Daniela Rodrigues Amorim used a common mouse model of myelin loss — a diet with the chemical cuprizone — to explore how sensory stimulation preserves myelination.

Amorim and Tsai’s team found that 40Hz light and sound not only preserved myelination in the brains of cuprizone-exposed mice, it also appeared to protect oligodendrocytes (the cells that myelinate neural axons), sustain the electrical performance of neurons, and preserve a key marker of axon structural integrity. When the team looked into the molecular underpinnings of these benefits, they found clear signs of specific mechanisms including preservation of neural circuit connections called synapses; a reduction in a cause of oligodendrocyte death called “ferroptosis;” reduced inflammation; and an increase in the ability of microglia brain cells to clean up myelin damage so that new myelin could be restored.

“Gamma stimulation promotes a healthy environment,” says Amorim, who is now a Marie Curie Fellow at the University of Galway in Ireland. “There are several ways we are seeing different effects.”

The findings suggest that gamma sensory stimulation may help not only Alzheimer’s disease patients but also people battling other diseases involving myelin loss, such as multiple sclerosis, the authors wrote in the study.

Maintaining myelin

To conduct the study, Tsai and Amorim’s team fed some male mice a diet with cuprizone and gave other male mice a normal diet for six weeks. Halfway into that period, when cuprizone is known to begin causing its most acute effects on myelination, they exposed some mice from each group to gamma sensory stimulation for the remaining three weeks. In this way they had four groups: completely unaffected mice, mice that received no cuprizone but did get gamma stimulation, mice that received cuprizone and constant (but not 40Hz) light and sound as a control, and mice that received cuprizone and also gamma stimulation.

After the six weeks elapsed, the scientists measured signs of myelination throughout the brains of the mice in each group. Mice that weren’t fed cuprizone maintained healthy levels, as expected. Mice that were fed cuprizone and didn’t receive 40Hz gamma sensory stimulation showed drastic levels of myelin loss. Cuprizone-fed mice that received 40Hz stimulation retained significantly more myelin, rivaling the health of mice never fed cuprizone by some, but not all, measures.

The researchers also looked at numbers of oligodendrocytes to see if they survived better with sensory stimulation. Several measures revealed that in mice fed cuprizone, oligodendrocytes in the corpus callosum region of the brain (a key point for the transit of neural signals because it connects the brain’s hemispheres) were markedly reduced. But in mice fed cuprizone and also treated with gamma stimulation, the number of cells were much closer to healthy levels.

Electrophysiological tests among neural axons in the corpus callosum showed that gamma sensory stimulation was associated with improved electrical performance in cuprizone-fed mice who received gamma stimulation compared to cuprizone-fed mice left untreated by 40Hz stimulation. And when researchers looked in the anterior cingulate cortex region of the brain, they saw that MAP2, a protein that signals the structural integrity of axons, was much better preserved in mice that received cuprizone and gamma stimulation compared to cuprizone-fed mice who did not.

A key goal of the study was to identify possible ways in which 40Hz sensory stimulation may protect myelin.

To find out, the researchers conducted a sweeping assessment of protein expression in each mouse group and identified which proteins were differentially expressed based on cuprizone diet and exposure to gamma frequency stimulation. The analysis revealed distinct sets of effects between the cuprizone mice exposed to control stimulation and cuprizone-plus-gamma mice.

A highlight of one set of effects was the increase in MAP2 in gamma-treated cuprizone-fed mice. A highlight of another set was that cuprizone mice who received control stimulation showed a substantial deficit in expression of proteins associated with synapses. The gamma-treated cuprizone-fed mice did not show any significant loss, mirroring results in a 2019 Alzheimer’s 40Hz study that showed synaptic preservation. This result is important, the researchers wrote, because neural circuit activity, which depends on maintaining synapses, is associated with preserving myelin. They confirmed the protein expression results by looking directly at brain tissues.

Another set of protein expression results hinted at another important mechanism: ferroptosis. This phenomenon, in which errant metabolism of iron leads to a lethal buildup of reactive oxygen species in cells, is a known problem for oligodendrocytes in the cuprizone mouse model. Among the signs was an increase in cuprizone-fed, control stimulation mice in expression of the protein HMGB1, which is a marker of ferroptosis-associated damage that triggers an inflammatory response. Gamma stimulation, however, reduced levels of HMGB1.

Looking more deeply at the cellular and molecular response to cuprizone demyelination and the effects of gamma stimulation, the team assessed gene expression using single-cell RNA sequencing technology. They found that astrocytes and microglia became very inflammatory in cuprizone-control mice but gamma stimulation calmed that response. Fewer cells became inflammatory and direct observations of tissue showed that microglia became more proficient at clearing away myelin debris, a key step in effecting repairs.

The team also learned more about how oligodendrocytes in cuprizone-fed mice exposed to 40Hz sensory stimulation managed to survive better. Expression of protective proteins such as HSP70 increased and as did expression of GPX4, a master regulator of processes that constrain ferroptosis.

In addition to Amorim and Tsai, the paper’s other authors are Lorenzo Bozzelli, TaeHyun Kim, Liwang Liu, Oliver Gibson, Cheng-Yi Yang, Mitch Murdock, Fabiola Galiana-Meléndez, Brooke Schatz, Alexis Davison, Md Rezaul Islam, Dong Shin Park, Ravikiran M. Raju, Fatema Abdurrob, Alissa J. Nelson, Jian Min Ren, Vicky Yang and Matthew P. Stokes.

Fundacion Bancaria la Caixa, The JPB Foundation, The Picower Institute for Learning and Memory, the Carol and Gene Ludwig Family Foundation, Lester A. Gimpelson, Eduardo Eurnekian, The Dolby Family, Kathy and Miguel Octavio, the Marc Haas Foundation, Ben Lenail and Laurie Yoler, and the U.S. National Institutes of Health provided funding for the study.

(Source : MITNews)

Quinton water is seawater that’s been filtered and diluted. It contains minerals and trace elements like magnesium, calcium, and potassium. People say it helps with hydration, energy, and mineral balance, but scientific proof is limited. It’s generally safe in small amounts, but its health benefits aren’t clearly proven.

A number of laboratory and small experimental studies show that Quinton (microfiltered seawater) can change how immune cells and other immune-related tissues behave, but the work so far is mostly in cells or small tests and not proof that it helps people in the long run. Some research found that exposing immune cells or airway cells to seawater-derived solutions altered markers of activation and inflammation — for example, certain inflammatory signals (the chemokines IL-8 and RANTES) went down in human bronchial epithelial cells after exposure, apparently because a key inflammatory switch called NF-κB was less active. (PubMed) Other ex vivo and in vitro tests on human white blood cells report changes in cell viability, aggregation and surface markers consistent with an “immunomodulatory” effect, meaning the solution seems able to nudge immune cell behavior under laboratory conditions. (totumsport.pl) At the same time, some pilot cell-culture studies found no clear positive effects on cell survival or growth, and overall the human clinical evidence is limited and mixed, so we can’t conclude Quinton reliably strengthens or “boosts” the immune system in people. (SpringerLink) Finally, many of the positive reports come from groups with links to Quinton product makers or marine-therapy proponents, so it’s important to view the results as preliminary and to wait for larger, independent clinical trials before assuming clear immune benefits in humans. (PubMed)

In simple terms, studies show Quinton (microfiltered seawater) can nudge the immune system in a few measurable ways in lab tests and small experiments, but those findings mostly come from cells or small, early studies rather than large human trials. One clear effect seen in cultured airway cells is a drop in pro-inflammatory signals—researchers measured lower levels of chemokines like IL-8 and RANTES after exposure to seawater and traced that change to reduced activity of a master inflammation switch called NF-κB. (PubMed) In immune cells such as macrophages or mononuclear cells, seawater or deep-sea mineral solutions have been reported to reduce inflammatory outputs (for example, lower nitrate/nitric-oxide production) and to alter signaling pathways linked to inflammation, again implicating NF-κB and related pathways. (ResearchGate) Other lab work shows seawater can change white-blood-cell behaviour — affecting cell aggregation, surface markers and markers of activation — which is why people call the effect “immunomodulatory” (it changes how immune cells act, not simply “boosts” them). (PubMed) At the level of mucosal defenses, non-diluted seawater has been shown to improve nasal or airway clearance functions (for example, by increasing ciliary beating), which can help the body remove irritants or microbes from the airway surface. (PMC) Importantly, these are mostly lab or small experimental results and some reports come from groups with commercial interest, so we can’t assume strong, reliable immune benefits for people yet; larger independent clinical trials are needed to know how meaningful these changes are for real-world health. (PubMed)

There’s no solid evidence that Quinton (microfiltered seawater) will treat or cure autoimmune diseases systemically; most results show only lab or small, local effects and more research is needed. (PMC)

What the studies do show is mostly from cell tests, animal experiments, or small human trials: seawater preparations can change immune-cell behavior in the lab (for example, lowering some inflammatory signals by acting on pathways such as NF-κB) and can alter markers on white blood cells. (PMC)

Applied to body surfaces, seawater-type solutions can help the nose, sinuses, eyes or skin by rinsing out mucus and irritants, improving local clearance and sometimes reducing local inflammation — that can ease symptoms when mucosal or skin irritation is part of the problem. (European Review)

But those local or laboratory effects do not equal proof that drinking or using Quinton will change the course of a systemic autoimmune disease like rheumatoid arthritis, lupus, or multiple sclerosis; large, independent clinical trials showing a meaningful benefit for those conditions are lacking. (PMC)

There are also safety and practical points to consider: nasal or topical rinses are generally safe but can cause temporary ear fullness, stinging, or mild nosebleeds in some people, and drinking large or improperly prepared seawater products could disturb electrolytes or expose you to contamination if not processed correctly. (PMC)

My practical recommendation: if you have an autoimmune disease, don’t stop or change prescribed treatments in favor of Quinton. Using properly made seawater sprays or rinses for local nasal or skin symptoms may be reasonable as an adjunct for symptom relief, but check with your doctor first so they can advise based on your specific condition and medicines.

By “alter markers on white blood cells” I mean that in lab tests seawater-derived solutions have been shown to change the proteins and signals that immune cells carry or release. Practically, that includes shifts in cell-surface proteins (the “CD” markers doctors use to ID and track cells), changes in molecules that help cells stick to blood vessels or move into tissues, and changes in what the cells secrete (cytokines and inflammatory mediators). Those changes can make a cell look or behave as if it is more or less “activated” — for example, better at moving to an inflamed site, more likely to eat (phagocytose) debris, or producing fewer inflammatory signals. These findings come mostly from cell or small experimental studies, so whether those marker changes actually help or harm people with real autoimmune disease is still unknown.

(Source : ChatGPT)

A decade after scientists in The Picower Institute for Learning and Memory at MIT first began testing whether sensory stimulation of the brain’s 40Hz “gamma” frequency rhythms could treat Alzheimer’s disease in mice, a growing evidence base supporting the idea that it can improve brain health — in humans as well as animals — has emerged from the work of labs all over the world. A new open-access review article in PLOS Biology describes the state of research so far and presents some of the fundamental and clinical questions at the forefront of the noninvasive gamma stimulation now.

“As we’ve made all our observations, many other people in the field have published results that are very consistent,” says Li-Huei Tsai, Picower professor of neuroscience at MIT, director of MIT’s Aging Brain Initiative, and senior author of the new review, with postdoc Jung Park. “People have used many different ways to induce gamma including sensory stimulation, transcranial alternating current stimulation, or transcranial magnetic stimulation, but the key is delivering stimulation at 40 hertz. They all see beneficial effects.”

A decade of discovery at MIT

Starting with a paper in Nature in 2016, a collaboration led by Tsai has produced a series of studies showing that 40Hz stimulation via light, sound, the two combined, or tactile vibration reduces hallmarks of Alzheimer’s pathology such as amyloid and tau proteins, prevents neuron death, decreases synapse loss, and sustains memory and cognition in various Alzheimer’s mouse models. The collaboration’s investigations of the underlying mechanisms that produce these benefits have so far identified specific cellular and molecular responses in many brain cell types including neurons, microglia, astrocytes, oligodendrocytes, and the brain’s blood vessels. Last year, for instance, the lab reported in Nature that 40Hz audio and visual stimulation induced interneurons in mice to increase release of the peptide VIP, prompting increased clearance of amyloid from brain tissue via the brain’s glymphatic “plumbing” system.

Meanwhile, at MIT and at the MIT spinoff company Cognito Therapeutics, phase II clinical studies have shown that people with Alzheimer’s exposed to 40Hz light and sound experienced a significant slowing of brain atrophy and improvements on some cognitive measures, compared to untreated controls. Cognito, which has also measured significant preservation of the brain’s “white matter” in volunteers, has been conducting a pivotal, nationwide phase III clinical trial of sensory gamma stimulation for more than a year.
“Neuroscientists often lament that it is a great time to have AD [Alzheimer’s disease] if you are a mouse,” Park and Tsai wrote in the review. “Our ultimate goal, therefore, is to translate GENUS discoveries into a safe, accessible, and noninvasive therapy for AD patients.” The MIT team often refers to 40Hz stimulation as “GENUS” for Gamma Entrainment Using Sensory Stimulation.

A growing field

As Tsai’s collaboration, which includes MIT colleagues Edward Boyden and Emery N. Brown, has published its results, many other labs have produced studies adding to the evidence that various methods of noninvasive gamma sensory stimulation can combat Alzheimer’s pathology. Among many examples cited in the new review, in 2024 a research team in China independently corroborated that 40Hz sensory stimulation increases glymphatic fluid flows in mice. In another example, a Harvard Medical School-based team in 2022 showed that 40Hz gamma stimulation using Transcranial Alternating Current Stimulation significantly reduced the burden of tau in three out of four human volunteers. And in another study involving more than 100 people, researchers in Scotland in 2023 used audio and visual gamma stimulation (at 37.5Hz) to improve memory recall.

Open questions

Amid the growing number of publications describing preclinical studies with mice and clinical trials with people, open questions remain, Tsai and Park acknowledge. The MIT team and others are still exploring the cellular and molecular mechanisms that underlie GENUS’s effects. Tsai says her lab is looking at other neuropeptide and neuromodulatory systems to better understand the cascade of events linking sensory stimulation to the observed cellular responses. Meanwhile, the nature of how some cells, such as microglia, respond to gamma stimulation and how that affects pathology remains unclear, Tsai adds. Even with a national phase III clinical trial underway, it is still important to investigate these fundamental mechanisms, Tsai says, because new insights into how noninvasive gamma stimulation affects the brain could improve and expand its therapeutic potential.

“The more we understand the mechanisms, the more we will have good ideas about how to further optimize the treatment,” Tsai says. “And the more we understand its action and the circuits it affects, the more we will know beyond Alzheimer’s disease what other neurological disorders will benefit from this.”
Indeed, the review points to studies at MIT and other institutions providing at least some evidence that GENUS might be able to help with Parkinson’s disease, stroke, anxiety, epilepsy, and the cognitive side effects of chemotherapy and conditions that reduce myelin, such as multiple sclerosis. Tsai’s lab has been studying whether it can help with Down syndrome as well.

The open questions may help define the next decade of GENUS research.

(Source : MITNews)