Lion's mane dosage: how much to take a day

The short answer

Most trials used 1 to 3 g a day of dried fruiting body, or about 1 g a day of an erinacine-rich mycelium extract, split into two to four doses with meals. That is a sensible daily dose for adults. Higher doses, up to 10 g a day, were tolerated but showed no extra benefit.

On this page

Every trial at a glance
What doses did the trials use?
So how much should you take?
Is more better?
Who needs a different dose?
Common questions
References

Every trial at a glance

Human trials of lion's mane, newest first
Study	Who took part	Dose	Length	What it found	Result
Evans 2026USA, focus and thinking	10 healthy adults aged 18 to 55Pilot, no placebo group	2 g a dayMycelium and fruiting body powder	28 days	No significant change in attention, task switching or blood BDNF levels.Ten people and no comparison group.	No benefit found
Surendran 2025UK, focus and thinking	18 healthy adults aged 18 to 35Double-blind, placebo-controlled crossover	3 g, single dose10:1 fruiting body extract	One dose, tested at 90 minutes	No overall effect on thinking or mood. One dexterity test (a pegboard) improved.Small, and a single dose only.	No benefit found
Docherty 2023UK, focus and thinking	41 healthy adults aged 18 to 45Double-blind, placebo-controlled	1.8 g a dayCapsules of a commercial lion’s mane blend	28 days	Quicker on one attention test (Stroop) an hour after the first dose. A trend towards less stress after 28 days that just missed significance. Most other measures did not change.A pilot study; the authors say the results should be treated with caution.	Mixed
La Monica 2023USA, focus and thinking	40 healthy adults aged 18 to 50Double-blind, placebo-controlled crossover	1 g, single doseFruiting body powder	One dose, tested at 1 and 2 hours	Faster reaction times on some tasks and more attempts on a mental arithmetic test.Funded in part by an ingredient supplier; single dose only.	Mixed
Grozier 2022USA, focus and thinking	24 healthy college-age adultsSingle-blind, placebo-controlled	10 g a dayFruiting body baked into muffins	4 weeks	No effect on thinking tasks or on how the body burned fuel during exercise.Small; the groups differed at the start.	No benefit found
Li 2020Taiwan, memory	41 people with mild Alzheimer’s diseaseDouble-blind, placebo-controlled	1.05 g a day (3 × 350 mg)Mycelium enriched in erinacine A	49 weeks	Memory test (MMSE) scores rose in the lion’s mane group while the placebo group declined on another test. Daily living scores also differed between groups.The product’s maker paid several of the authors; 8 of 49 people dropped out.	Benefit found
Saitsu 2019Japan, memory	31 adults over 50 (average age 61)Double-blind, placebo-controlled	3.2 g a dayFruiting body powder tablets	12 weeks	Improved scores on a short memory and thinking test (MMSE). Two other memory tests showed no difference.Small; only one of three tests improved.	Mixed
Vigna 2019Italy, mood and sleep	77 adults with overweight or obesity on a low-calorie dietRandomised, compared with diet alone (no placebo)	1.5 g a dayCapsules: mycelium plus fruiting body extract	8 weeks	Depression, anxiety and sleep scores fell in the lion’s mane group; mood scores did not change significantly with diet alone.No placebo, so expectation effects cannot be ruled out; the maker supplied the capsules.	Benefit found
Nagano 2010Japan, mood and sleep	26 women with general health complaints (average age 41)Double-blind, placebo-controlled	2 g a dayFruiting body baked into cookies	4 weeks	Depression and general-complaint scores fell from where they started. Only a couple of items differed from placebo.Only 12 people took lion’s mane; most changes were within the group, not against placebo. Sleep did not improve.	Mixed
Mori 2009Japan, memory	30 adults aged 50 to 80 with mild cognitive impairmentDouble-blind, placebo-controlled	3 g a dayFruiting body powder tablets	16 weeks	Thinking test scores rose steadily compared with placebo, then fell again within 4 weeks of stopping.Small; 15 people took lion’s mane.	Benefit found

Newest first. Each study name links to its PubMed record.

What doses did the trials use?

The ten human trials used between 1 g and 10 g a day, and the table above lists each one. The doses fall into three groups:

Fruiting body powder, 2 to 3.2 g a day. Used in the memory trials in Japan (3 g and 3.2 g a day, as tablets taken three or four times a day) and the mood trial (2 g a day in cookies).
Mycelium extract, about 1 to 1.5 g a day. The Alzheimer’s trial used three 350 mg capsules a day of mycelium containing 5 mg of erinacine A per gram. The Italian mood study used 1.5 g a day of a mycelium and fruiting body blend.
Healthy adult trials, 1 to 10 g. 1.8 g a day for 28 days, single doses of 1 g and 3 g, and 10 g a day in muffins. None of these found a lasting benefit.

So how much should you take?

For an adult, 1 to 3 g a day of fruiting body powder is the dose best supported by the trials, taken with meals and split into two or three doses. If you prefer mycelium, look for an extract that states its erinacine A content and follow the Alzheimer’s trial: about 1 g a day.

What you have	A dose in line with the trials
Fruiting body powder or capsules	1 to 3 g a day
Erinacine A-standardised mycelium (5 mg/g)	About 1 g a day (3 × 350 mg)
Extract with a stated beta-glucan content	Enough to give 0.2 to 0.5 g of beta-glucan a day
Extract with only a ratio (such as 8:1 or 10:1)	Hard to say; ask the seller what it is standardised to
Mushroom coffee	Usually well below trial doses

The beta-glucan figure comes from lab analysis of lion’s mane fruiting bodies, which found about 17% beta-glucan by dry weight: 1 to 3 g of powder therefore provides roughly 0.2 to 0.5 g.

Is more better?

Not on current evidence. The highest dose tested, 10 g a day for four weeks, was well tolerated but did nothing measurable for thinking. Start at the lower end, at 1 g a day, for the first week, then increase if you want to.

Who needs a different dose?

There is no trial evidence for children, pregnancy or breastfeeding, so there is no safe dose to recommend for them. If you take regular medicines, or have liver or kidney disease, ask your pharmacist first. See safety.

Common questions

How many grams of lion's mane should I take a day?

1 to 3 g a day of fruiting body powder, or about 1 g a day of a standardised mycelium extract, covers the doses used in the trials that found benefits.

How do I dose a 10:1 lion's mane extract?

In theory 300 mg of a 10:1 extract comes from 3 g of mushroom, but an extract keeps some compounds and loses others, so it is not a straight swap. Choose a product that states its beta-glucan content, and compare that with about 0.2 to 0.5 g of beta-glucan a day, roughly what 1 to 3 g of fruiting body provides.

Is 500 mg of lion's mane enough?

500 mg of plain powder is below every trial dose. It may be enough if it is a concentrated extract, but the label needs to show what it is standardised to before you can tell.

Can I take lion's mane every day?

Yes. The trials gave it daily for up to 49 weeks without serious side effects.

References

First published 3 November 2026. Spotted an error? Tell us and we'll correct it. Read our editorial policy.