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Lion's Mane Mushroom: Memory Benefits, What the Research Shows, and Safety
Lion's mane (Hericium erinaceus) is an edible mushroom sold for memory and focus. One small trial in mild cognitive impairment found better scores, which faded after stopping.
Last updated 2 November 2026
Lion's Mane: the short answer
Lion's mane (Hericium erinaceus) is an edible mushroom, called yamabushitake in Japan, sold for memory, focus and nerve health. The main human evidence is one small trial: 30 older adults with mild cognitive impairment who took 3 g a day of dried mushroom powder for 16 weeks scored better on a memory test than those on a placebo, but the benefit faded within 4 weeks of stopping. In 41 healthy young adults, it had little overall effect. It raises nerve growth factor in laboratory and animal studies, but no human study shows it regrows brain cells. It is generally well tolerated; avoid it if you are allergic to mushrooms.
| What it is | An edible mushroom (Hericium erinaceus, yamabushitake); supplements use fruiting body or mycelium powders and extracts. |
|---|---|
| Most studied for | Memory in older adults with mild cognitive impairment; focus and stress in healthy adults. |
| Amounts used in studies | 1.8 g to 3 g a day of dried mushroom powder, for up to 16 weeks. |
| Strength of evidence | Limited: one small trial in mild cognitive impairment (benefit faded after stopping) and small trials in healthy adults with little overall effect. |
| Safety | Generally well tolerated in short trials; avoid if allergic to mushrooms; little data in pregnancy. |
| In products we review | NeuroVera, JointVive, NeuroPrime, Cholibrium, Pineal Guardian X, Neura |
Sources: Lion's mane (yamabushitake) in mild cognitive impairment: randomized trial (Phytother Res 2009) · Acute and 28-day effects of lion's mane in healthy young adults (Nutrients 2023)
Benefits of Lion's Mane
What is lion’s mane?
Lion’s mane, Hericium erinaceus, is an edible mushroom that grows on hardwood trees and looks like a white cascade of hanging spines, hence its name. In Japan it is called yamabushitake, and it is eaten as a food in East Asia. Supplements use powder or extracts of the fruiting body (the mushroom itself) or of the mycelium grown in culture, and the two differ in their compounds.
Why people take it
Lion’s mane is sold mainly for memory, focus and “brain health”, and also for mood, nerve health and, in some products, cholesterol.
Top Rated Supplements with Lion's Mane
Products we review that list Lion's Mane as an ingredient. Not every product discloses how much of each ingredient a serving contains, so check each review before assuming it matches the amounts used in studies.
NeuroVera is a two-capsule daily memory supplement from Nutraville built around bacopa, lion’s mane, gotu kola, shilajit and schisandra. It is unusually cheap for its category, at $49 a bottle or less, and carries a 365-day money-back guarantee. This review covers what the research on those ingredients supports, what the vendor leaves out, the real prices and how the refund works.
JointVive is a liquid supplement from Nutraville sold for joint comfort, flexibility and mobility, taken as “one drop per day” from a 60 ml dropper bottle. It names nine ingredients: pine bark extract, tamarind, chlorella, ginkgo biloba, spirulina, lion’s mane mushroom, bacopa, moringa and neem, with no amounts. This review covers what is known about each, why only two of them have any joint research, the real prices and how the 365-day refund works.
NeuroPrime is a liquid memory supplement in a 60 mL dropper bottle, with bacopa, lion’s mane, ginkgo, pine bark and five other ingredients. This review covers what is in it, why the dose is unclear, which ingredients have trials, the references we checked, and how its 365-day guarantee compares with its return policy.
Cholibrium is a two-capsule daily supplement from Simple Promise that combines ten mushrooms, including reishi, lion’s mane, cordyceps, shiitake and maitake, and is sold for cholesterol, triglycerides and blood pressure. This review checks its label, the study behind its “80 points” claim, what mushroom trials in people actually found, and the prices and 365-day refund.
Pineal Guardian X is a liquid memory supplement sold through ClickBank on a story that fluoride hardens the pineal gland and causes memory loss. Its nine ingredients are the same as NeuroPrime’s, from the same company. This review checks the claims, the prices and the refund rules.
Neura is a memory and focus capsule from Binaural Technologies, sold through ClickBank, with lion’s mane, goji berry, bacopa and shilajit. This review checks its claims against the research and explains the prices, the neuroscientist in the sales pitch and the refund rules.
Scientific Analysis of Lion's Mane
Memory and mild cognitive impairment
The main human evidence comes from a 2009 Japanese trial. Thirty adults aged 50 to 80 with mild cognitive impairment took either 3 g a day of dried lion’s mane powder (four 250 mg tablets three times a day) or a placebo for 16 weeks. The lion’s mane group scored better on a cognitive screening test from week 8 onwards, but the scores fell again within 4 weeks of stopping. The trial was small and was run by a mushroom company, and it has not been repeated on a larger scale.
Healthy adults: focus and stress
In a 2023 trial, 41 healthy adults aged 18 to 45 took 1.8 g of lion’s mane or a placebo. An hour after a single dose, they were faster on one attention task, but after 28 days there was only a trend towards lower stress that did not reach statistical significance, and most other measures did not change. The authors describe the findings as tentative.
Nerve growth factor and “brain cells”
Compounds in lion’s mane, called hericenones and erinacines, raise nerve growth factor in laboratory and animal studies, which is the basis of most brain-health claims. No human study shows that a lion’s mane supplement regrows brain cells or prevents dementia.
Cholesterol
Claims that lion’s mane lowers cholesterol come from studies in rats, including a 2003 study of a substance the mushroom makes when grown in liquid culture. We found no trials in people.
How much lion’s mane per day
There is no standard dose. The trials used 1.8 g to 3 g a day of dried mushroom powder. Extracts are more concentrated, and products differ in whether they use the fruiting body or mycelium, so the trial doses do not translate directly; benefits in the memory trial appeared after 8 weeks and faded after stopping.
Side effects and safety
Lion’s mane is eaten as a food, and no serious side effects were reported in the small trials, although they lasted only weeks to months. People who are allergic to mushrooms should avoid it, and there are not enough data on pregnancy and breastfeeding. Memory problems that are new or getting worse need a doctor’s assessment rather than a supplement.
Products we review that contain it
The memory supplements NeuroVera, NeuroPrime, Neura and Pineal Guardian X list lion’s mane without stating the amount. Cholibrium lists 266 mg of fruiting body in a cholesterol formula, and JointVive includes it in a joint formula, although it has not been studied for joints.
Frequently Asked Questions
An edible mushroom, Hericium erinaceus, called yamabushitake in Japan. It is sold as a powder or extract for memory, focus and nerve health.
The evidence is limited. In one small trial, older adults with mild cognitive impairment scored better on a memory test while taking 3 g a day for 16 weeks, but the benefit faded after stopping. In healthy young adults it had little overall effect.
Possibly a little in older adults with mild cognitive impairment, based on one trial of 30 people. There is no good evidence that it improves memory in healthy people or prevents dementia.
There is no standard dose. Trials used 1.8 g to 3 g a day of dried mushroom powder; extracts are more concentrated, so follow the label of a product that states its amount and form.
In the memory trial, differences appeared after 8 weeks of daily use and faded within 4 weeks of stopping.
No serious side effects were reported in short trials. Avoid it if you are allergic to mushrooms, and ask a doctor first if you are pregnant or breastfeeding.
Among the products we review, NeuroVera, NeuroPrime, Neura and Pineal Guardian X list it without the amount, Cholibrium lists 266 mg, and JointVive includes it in a joint formula.
⚖️ Conclusion
Lion's mane is an interesting mushroom with a thin evidence base: one small trial found better memory scores in older adults with mild cognitive impairment that faded after stopping, and trials in healthy adults showed little overall effect. Its effects on nerve growth factor are real in the laboratory but unproven in people, and the cholesterol claims rest on rat studies. It appears to be safe to try, apart from mushroom allergies, but a product that does not state how much it contains cannot be compared with the 1.8 g to 3 g a day used in the trials.