SupplementsHerbs & MushroomsLion's Mane
Lion's Mane
Hericium erinaceus, fruiting body and mycelia
An edible mushroom that looks like a white shaggy mane, taken for memory and focus, with small studies that are genuinely interesting and far from settled.
- Builds up
- About 16 weeks
- In your body
- Not known
- Per 1 capsule
- 500 mg
- 30-day supply
- $10.50One capsule a day, plus packing and delivery
What is lion's mane?
Lion's mane is an edible mushroom, known in Japan as yamabushitake. It's popular for one reason above all: two families of compounds inside it, called hericenones and erinacines, make cells produce more nerve growth factor in the lab. That's a protein nerve cells rely on to grow and stay healthy.
The part you'd recognize as the mushroom is called the fruiting body. Below it runs the mycelia, a network of fine root-like threads. Hericenones come from the fruiting body and erinacines mainly from the threads, which is why some products use both.
Ours does: organic fruiting body and mycelia, with myceliated brown rice, meaning brown rice the threads have grown through. Most of what we know still comes from small studies, so think of it as a promising daily habit rather than a sure thing.
What it does
- MemoryTraditionally used to support memory and clear thinking.
- FocusSupports focus and mental sharpness.
- MoodSupports a balanced mood during stressful times.
- GutMay support a varied community of gut bacteria.
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.
What people take it for
Early daysMemory with ageIn a small study of older adults with mild memory trouble, scores rose over 16 weeks on 3 g a day.
Early daysFocus and speedHealthy young adults got faster on a focus test an hour after 1.8 g. A month of it changed much less.
Early daysStress and moodSmall studies hint at less stress and anxiety. In the newest one, though, people improved whichever capsule they got.
How long it takes
In the best-known study, scores pulled ahead by week 8 and kept rising until week 16. Think of it as a slow habit, not a quick lift.
- 1 hourWhen a single serving made young adults faster on a focus test
- 8 to 16 weeksWhen older adults' memory scores pulled ahead and kept climbing
- 4 weeks after stoppingThose scores had dropped again, so any benefit seems to need steady use
How long it stays in your body
Nobody has measured this in people. In rats, one key compound reached the brain within an hour and peaked at about 8 hours.
What's in a capsule
One capsule holds 500 mg of organic lion's mane. Studies mostly used 1.8 g to 3 g a day of mushroom powder, so one capsule is well below what they tested.
Why the effect may fade, and why form matters
The most quoted lion's mane study has a twist people rarely mention. Older adults in Japan improved steadily over 16 weeks. Four weeks after they stopped, their scores had fallen again. It was a small group of 30, but it suggests this isn't something you stock up on. It seems to work only while you keep going.
Most of the excitement comes from nerve growth factor, seen in cells and animals. That hasn't been shown directly in people. In rats, the threads' compounds can cross into the brain, which is one reason researchers keep looking.
Ours blends fruiting body with mycelia, and why the part of the mushroom matters is in the full guide. Lion's mane has also been linked to a wider mix of gut bacteria, including the kind that make short-chain fatty acids, which feed the cells lining your gut.
What it interacts with
- Blood thinners and antiplatelet medicinesA lion's mane compound slowed platelet clumping in the lab, including in human platelets. It hasn't been tested in people, so ask first.
- Diabetes medicinesA water extract lowered blood sugar in diabetic rats. It hasn't been tested in people on these medicines, so tell your doctor and watch your numbers.
- Any regular medicineVery little research has looked at lion's mane alongside medicines. No news here isn't the same as safe, so mention it to your pharmacist.
- Mushroom ImmuneThat blend already holds lion's mane threads, so you'd be having it twice, in a small amount.
Goes well with
Side effects
- Stomach discomfort or loose stools. In the main study this happened about as often with a dummy pill.
- Headache or a skin rash now and then.
- Allergic reactions are possible. One 63-year-old man in Japan developed a serious lung reaction after long use, thought to be allergic. It's the only report of its kind, but stop and get help if you have trouble breathing.
Check first if
- Mushroom allergies: skip it or ask first.
- Rice allergy: the capsule contains rice.
- Pregnancy or breastfeeding: there isn't enough safety data, so check with your doctor.
- Bleeding disorders or upcoming surgery: ask first.
- Diabetes: keep an eye on your sugar and tell your doctor.
- New memory trouble: see a doctor rather than self-managing it. Thyroid, kidney and liver problems can all affect memory.
The blood tests that go with it
- TSHThyroid problems can cause memory trouble, so this is worth ruling out.
- Vitamin B12Low B12 over time can harm nerves and make it hard to concentrate, and it's an easy test.
- Morning cortisolYour main stress hormone, if stress is why you're trying it.
- Gut diversityLion's mane has been linked to a wider mix of gut bacteria.
- Butyrate potentialHow well your gut bacteria can make butyrate, a fatty acid your gut lining uses.
- PlateletsThe blood cells a lion's mane compound affected in the lab.
- Fasting glucoseLion's mane lowered blood sugar in diabetic rats, so it's worth watching if you manage yours.
Supplementation
Find Lion's Mane in a ready-made protocol.
Start from one of these, or add it to your own. Everything comes in one pouch each morning.
Mind & balance
For your focused hours.
30-day pack · 5 a morning · 150 pills
$70.35 / month
Choose this packYour own
Build your own pouch.
Know what you want to take? Pick each ingredient, and we time it through your day.
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- cGMP-certifiedFacilities
- FDA-registeredFacilities
- Accredited labsIndependent testing
- Non-GMOIngredient options
- OrganicIngredient options
- VeganFormula options
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.
Want it more precise? Get the app.
A page can only tell you about Lion's Mane. The app tells you about you: whether it fits, when to take it, and whether it's working.
- Checked against your blood work and everything you already take
- On your daily timeline, around your sleep, training and meals
- Followed over time, so you can see what moved
Lion's ManeOPEN 09:00Lion's Mane against your blood work, your sleep and what you already take.
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Questions
What is lion's mane good for?
Mostly memory, focus and mood. The research is early and comes from small studies, though the results are interesting enough to keep people looking.
How long does lion's mane take to work?
In the best-known study, scores improved from week 8 and kept rising to week 16. One study saw faster reactions an hour after a serving, but that's a small, single finding.
What are the side effects of lion's mane?
Usually mild: stomach discomfort, headache or a rash. It's a mushroom, so allergic reactions are possible, and one serious lung reaction has been reported.
What does lion's mane interact with?
No well-studied interactions yet, which mostly means nobody has checked. Lab work on platelets is why people on blood thinners should ask first, and rat studies on blood sugar are why people on diabetes medicine should too.
Who should not take lion's mane?
Anyone with a mushroom allergy. If you're pregnant, breastfeeding, on blood thinners or diabetes medicine, or have surgery coming up, ask your doctor first.
Does lion's mane help grow brain cells?
It raises nerve growth factor in cells and animals. Nobody has shown that happening in the human brain yet, so be wary of anyone saying it regrows yours.
Can I take lion's mane every day?
Studies gave it daily for 4 to 16 weeks, and one group's benefit faded after they stopped. Longer use hasn't been studied much, so check in with your doctor if you stay on it.
What's the half-life of lion's mane?
There isn't a known number in people. In rats, a key compound reached the brain within an hour and peaked at about 8 hours.
Sources
- Mori K et al. Improving effects of Hericium erinaceus on mild cognitive impairment. Phytother Res, 2009.
- Docherty S et al. The acute and chronic effects of lion's mane mushroom supplementation on cognitive function, stress and mood in young adults. Nutrients, 2023.
- Nagano M et al. Reduction of depression and anxiety by 4 weeks Hericium erinaceus intake. Biomed Res, 2010.
- Smith EF, Docherty S. Four-week supplementation of lion's mane and a lion's mane and reishi blend on mood and wellbeing in young women. Front Nutr, 2026.
- Menon A et al. Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Front Nutr, 2025.
- Tsai PC et al. Preclinical bioavailability and tissue distribution of erinacine A. Molecules, 2021.
- Mori K et al. Inhibitory effect of hericenone B from Hericium erinaceus on collagen-induced platelet aggregation. Phytomedicine, 2010.
- MedlinePlus. Memory.
- MedlinePlus. Vitamin B12 deficiency anemia.
- Liang B et al. Antihyperglycemic and antihyperlipidemic activities of aqueous extract of Hericium erinaceus in diabetic rats. BMC Complement Altern Med, 2013.
Written by LifeFrom from these sources, and not yet reviewed by a clinician. Talk to your doctor before starting a supplement.
