Summary
Lion's Mane is an edible mushroom that may support memory and focus, mainly by encouraging the brain's own nerve growth signals.
Early human trials are promising but small: benefits appeared after weeks of daily use rather than after a single dose. Think of it as a slow, steady support, not a quick boost.
You walk into a room and forget why. You read the same paragraph twice. Many people now reach for Lion's Mane, the shaggy white mushroom popular in brain health circles. Here is how it works, what human studies have found, and how to use it sensibly.
How does Lion's Mane work in the brain?
Lion's Mane (Hericium erinaceus) contains two families of natural compounds: hericenones in the mushroom itself and erinacines in its root like threads, called mycelium.
- Nerve growth support: in lab and animal studies, these compounds encourage the body to make nerve growth factor, a protein that helps brain cells grow, repair and stay connected.
- Brain "fertiliser": a 2025 review also linked it to higher BDNF, another protein that nourishes brain cells.
Most of this comes from laboratory research, so the human picture is still forming.
Lion's Mane is not a stimulant. Its proposed action is slow and structural, which is why trials that run for weeks tend to show more than single dose studies.
What does the research show?
Memory in older adults. A 2019 randomised, placebo controlled trial in Biomedical Research gave middle aged and older adults Lion's Mane supplements or placebo for 12 weeks. The Lion's Mane group scored better on a standard memory and thinking screen, while two other memory tests did not change.
Speed and stress in young adults. A 2023 pilot study in Nutrients followed 41 healthy adults taking 1.8 g of Lion's Mane daily. One hour after the first dose, participants were quicker on a classic attention test, and after 28 days there was a trend towards lower everyday stress.
A single dose is not enough. A 2025 study in Frontiers in Nutrition gave 18 young adults one 3 g dose of a concentrated extract. Overall memory, attention and mood did not improve versus placebo, suggesting Lion's Mane works gradually.
The bigger picture. A 2025 systematic review, also in Frontiers in Nutrition, brought together five randomised trials plus laboratory work. It found promise for thinking skills and mood, with uncommon side effects such as stomach discomfort, headache and allergic reactions.
| Study | Who took part | What they found, in plain words |
|---|---|---|
| Biomedical Research, 2019 | Middle aged and older adults, 12 weeks | Better scores on a memory and thinking screen |
| Nutrients, 2023 | 41 healthy young adults, 28 days | Faster on an attention test, trend towards less stress |
| Frontiers in Nutrition, 2025 | 18 healthy young adults, one dose | No overall change after a single dose |
| Frontiers in Nutrition review, 2025 | Five randomised trials combined | Promising for cognition and mood, generally well tolerated |
How to use Lion's Mane
- Amounts studied: human trials have used around 1.8 g to 3 g per day of mushroom powder or extract. Products differ in strength, so follow the label.
- Timing: morning or midday with food suits most people, since it is not sleep promoting or energising.
- Give it time: the positive trials ran for 4 to 12 weeks. Daily, consistent use matters more than the exact hour.
- Good companions: it pairs naturally with other slow acting botanicals such as Bacopa Monnieri.
Who should be cautious: anyone allergic to mushrooms, people who are pregnant or breastfeeding, and anyone taking regular medication should speak with a doctor or pharmacist first.
Where Lion's Mane fits in Ultimind
We included Lion's Mane in Ultimind as one part of a wider formula, alongside Bacopa Monnieri, Ginkgo Biloba, Gotu Kola, Saffron, 5 HTP and Vitamin B12, which contributes to normal psychological function and the reduction of tiredness and fatigue. Each capsule uses liposomal delivery, wrapping the ingredients in tiny phospholipid spheres to help shield them through digestion. The formula is registered with the Greek National Organization for Medicines (EOF). For the wider evidence, see our guide to evidence based nootropics.
Frequently asked questions
How long does Lion's Mane take to work?
Studies that found benefits lasted 4 to 12 weeks. A single dose showed little overall effect, so plan on at least a month of daily use.
Can I take Lion's Mane every day?
Yes, the human trials used daily intake and reported it was generally well tolerated. Stop and speak to a doctor if you notice stomach upset, headache or signs of allergy.
Is Lion's Mane a stimulant like coffee?
No. It does not act on alertness the way caffeine does. Its proposed effects build slowly by supporting the brain's own growth and repair signals.
Bottom line
Lion's Mane is a gentle, research backed option for supporting memory and focus over time. Trials are still small, but results favour steady daily use for several weeks, with a good safety record.
Explore Ultimind →Related reading: NOUS
Sources
- Saitsu Y, Nishide A, Kikushima K, Shimizu K, Ohnuki K. Improvement of cognitive functions by oral intake of Hericium erinaceus. Biomedical Research (Tokyo). 2019. doi.org/10.2220/biomedres.40.125
- Docherty S, Doughty FL, Smith EF. The Acute and Chronic Effects of Lion's Mane Mushroom Supplementation on Cognitive Function, Stress and Mood in Young Adults: A Double-Blind, Parallel Groups, Pilot Study. Nutrients. 2023. doi.org/10.3390/nu15224842
- Surendran G, Saye J, Binti Mohd Jalil S, et al. Acute effects of a standardised extract of Hericium erinaceus (Lion's Mane mushroom) on cognition and mood in healthy younger adults: a double-blind randomised placebo-controlled study. Frontiers in Nutrition. 2025. doi.org/10.3389/fnut.2025.1405796
- Menon A, Jalal A, Arshad Z, Nawaz FA, Kashyap R. Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Frontiers in Nutrition. 2025. doi.org/10.3389/fnut.2025.1641246
