Encyclopedia/Botanical/TCM/encyclopedia-lions-mane

Lion's Mane

Hericium erinaceus (Bull.) Pers.

Sources

7 listed

Best forFor adults interested in the mushroom as food and in its traditional uses. Benefits for memory or nerves are not reliably established. Supplements require particular caution with blood-thinning medicines and during pregnancy or breastfeeding.

Clinical evidence

Emerging

Real World Significance

28Regional historical significance

Breadth 25 Depth 22 Density 27 Convergence 25 Continuity 55

SafetyUsually well toleratedThe rating reflects food use and generally good tolerability of the specific preparations studied. It is not a safety guarantee for all extracts or doses. Allergies, possible interactions with blood-thinning medicines and limited evidence on long-term use, pregnancy and breastfeeding remain relevant.

Tradition

TCM

Common preparations

PowderCapsuleTinctureFresh mushroomDried mushroomDual extract

In short

Summary of findings for quick reference

Lion's Mane is an edible mushroom with distinctive white spines, known as hou tou gu in China and yamabushitake in Japan. Modern sources describe culinary use and traditional digestive uses, without establishing a precise historical starting date. It also grows in central Europe but is rare in Austria.

Some constituents affect a signalling protein important to certain nerve cells in laboratory experiments. This explains scientific interest but does not show that eating the mushroom improves memory or regenerates damaged human nerves. The visible fruiting body, its network of fungal threads and their extracts also differ in composition.

Human studies are small and involve different preparations and populations. One trial found improved test scores in mild cognitive impairment, followed by declining scores after treatment stopped. Other findings are mixed. This evidence does not support a reliable treatment recommendation.

Clinical evidence ↔ Historical significance

We display two separate evidence categories: clinical evidence from modern trials and historical significance from documented healing tradition. Both are valuable, but they answer different questions.

In every encyclopedia entry we evaluate two distinct categories of evidence. Clinical evidence as used in trials meets a narrower but scientifically essential bar. At the same time, the hundreds of thousands of plant species worldwide have only partially been captured and tested in modern studies.

Alongside the trial picture our researchers compile a comprehensive overview of where and since when a plant has been used across different traditions of natural medicine. When a plant has been used as a medicinal plant in many cultures across many generations, that historical significance deserves to be visible too.

Our position: a truly informative overview emerges only when both categories sit side by side. We communicate transparently what counts as what.

Overview

Lion's Mane (Hericium erinaceus) is an edible mushroom with cream-white, hanging spines. It grows on hardwood trees and is also cultivated. Known as hou tou gu in China and yamabushitake in Japan, it is used as food in East Asia. Modern Chinese accounts also describe traditional medicinal uses.

Modern interest focuses on possible effects on memory and nerve cells, prompted by laboratory work on individual constituents. Small human trials provide preliminary, mixed findings. They do not establish a reliable benefit for healthy people or a treatment for memory disorders.

History

Chinese sources describe hou tou gu as food and, in modern accounts of traditional medicine, for stomach and digestive complaints. The sources available here do not securely date the beginning of medicinal use. In Japan the mushroom is known as the edible yamabushitake.

Lion's Mane also occurs in central Europe, with rare records from Austria. Occurrence alone does not establish use as a local household remedy. Since the early 1990s, researchers have investigated individual constituents in relation to nerve cells. These experiments and subsequent human trials should be distinguished from reported traditional uses.

Mechanism

Hericenones have been isolated from the fruiting body, the visible part of the mushroom; erinacines have been isolated from mycelium, its network of fungal threads. Individual compounds from these groups can stimulate nerve growth factor (NGF) production in laboratory experiments. NGF supports the survival and development of certain nerve cells.

These experiments explore possible mechanisms rather than establishing everyday benefits. Results for an isolated compound cannot automatically be transferred to the whole mushroom or every supplement. Whether the tested amounts produce the intended effects in humans remains uncertain. They do not establish reliable protection against dementia or regeneration of damaged nerves.

Mori and colleagues studied 30 adults with mild cognitive impairment in 2009. Scores were better with mushroom tablets than placebo at weeks 8, 12 and 16, then declined four weeks after treatment stopped. Saitsu and colleagues reported a benefit on one of three tests after 12 weeks in 2019. Nagano and colleagues studied women with various non-specific complaints in 2010. Differences in irritability and anxiety after four weeks were trends rather than statistically significant benefits over placebo.

The studies assess different abilities and complaints. Small samples and different preparations limit conclusions across trials. A positive test result does not automatically mean a noticeable benefit in daily life. The findings do not justify a general recommendation for memory disorders, anxiety or menopausal symptoms. Fruiting bodies, mycelium and concentrated extracts need separate assessment, including their food regulatory status.

Evidence

4 Outcomes evaluated. Sorted by grade.

Outcome	Class	Grade	Effect	Studies	Refs
Cognitive test scores in mild cognitive impairment30 adults aged 50 to 80 with mild cognitive impairment	Emerging	D	Preliminary Signal	1 study	[1]
Nerve growth factor production in laboratory studiesCell culture and animal models	Traditional	D	Lab Findings, Clinical Unclear		[7]
Traditional Chinese medicinal and culinary useAccounts of Chinese traditional use and East Asian cuisine	Traditional	D	Traditional use reported		No references
Irritability and anxietyWomen with various non-specific complaints	Insufficient	D	No established advantage over placebo	1 study	[3]

Usage

Forms and preparation

Fruiting bodies, mycelium and extracts are different materials. Their constituents also depend on strain and production. A dual extract uses water and alcohol; the term does not establish whether fruiting body, mycelium or both were used. The trials discussed here do not establish its superiority over other preparations. The fresh mushroom has a tender, somewhat seafood-like texture. Sauté it in butter or oil over moderate heat until cooked through and golden at the edges. Ground dried fruiting body can be cooked in soup. Supplement labels should identify the fungal material and distinguish powder from extract. A product description alone does not establish a health benefit.

Dosage

There is no generally established treatment dose. Mori used 3 g of tablets containing 96% dried mushroom powder daily, equivalent to 2.88 g powder, for 16 weeks in 2009. Nagano used 2 g fruiting-body powder daily in cookies for four weeks in 2010. These are study regimens, not dosing recommendations. One gram of extract cannot be assumed equivalent to 3 g mushroom powder. A safe upper amount for long-term use is not adequately established. A 2020 pilot did run for 49 weeks, but tested a specific erinacine A-enriched mycelial preparation in people with mild Alzheimer's disease. It does not establish a long-term regimen for other products or healthy people. Normal food portions are distinct from such study preparations.

Safety

Safety profile

Lion's Mane has generally been well tolerated as food and in small trials. Gastrointestinal complaints, rash and allergic reactions can occur. Do not experiment with a supplement on your own if you have a known mushroom allergy. An isolated constituent inhibited platelet aggregation in laboratory experiments; a human drug interaction has not been established. If you use anticoagulants such as warfarin or antiplatelet medicines such as aspirin, discuss supplementation with your clinician first. Adequate data on concentrated supplements in pregnancy and breastfeeding are lacking, so avoid them as a precaution. Use as a cooked food is a different exposure. Leave rare wild specimens in place and choose cultivated mushrooms for cooking. Any wild collection must take local collection and conservation rules into account.

Look-alikes

Botany

Family

Hericiaceae

Native regions

Europe, including rare records in Austria; older broad usage also included Asian and North American species

Harvest window

Autumn fruit bodies on wounds and decay sites of dead or dying hardwoods

Habitat

European H. erinaceus occurs in hardwood forests, particularly on old beech and oak and on dead wood. Rare Austrian records are documented. Similar East Asian and North American fungi were long included under the same name, but a 2025 genetic study distinguishes separate species. This entry retains the names used in older trials; their findings cannot be transferred without checking to every mushroom sold as Lion's Mane.

Identification & foraging

The fruiting body usually forms a white to cream, rounded cushion with long downward-pointing spines. It is barely branched and may reach about 30 cm across, becoming yellowish to brown with age. Fruiting bodies occur on hardwood, including injured old trees and fallen trunks. Its distinctive appearance does not replace reliable identification.

Similar plants and look-alikes

Unpleasant

Hericium coralloides and Hericium americanum

Hericium coralloides also occurs in central Europe and forms distinctly branched, coral-like fruiting bodies. H. americanum is primarily known from eastern North America and is also branched. H. erinaceus usually forms a barely branched cushion. These are distinct species; resemblance alone does not justify transferring study results or approving a specimen for eating.

FAQs

Does Lion's Mane grow in Austria?

Yes, rare finds are documented in Austria. It grows on hardwood and is particularly associated with old beech and oak in central Europe. Local occurrence does not establish a household-remedy tradition. Leave rare wild specimens in place and use cultivated mushrooms for cooking.

Fruiting body or mycelium: what is the difference?

The fruiting body is the visible mushroom; mycelium is its network of fungal threads. Their composition differs and also depends on strain and processing. The studies discussed here do not establish a best form. Dual extraction uses water and alcohol; it does not automatically combine fruiting body and mycelium. Look for a clear description of the source material. Results for one preparation do not apply to all products.

What is NGF, and does the mushroom help memory?

NGF means nerve growth factor, a signalling protein that supports certain nerve cells. Individual fungal compounds can stimulate its production in laboratory experiments. That does not show that the mushroom regenerates damaged human nerves or reliably improves memory. Small studies provide preliminary findings on some tests; a reliable benefit in healthy people is not adequately established.

How long would an effect take?

There is no reliable prediction. The cognitive trials discussed here lasted twelve or sixteen weeks, but this is not a recommendation to take any supplement for that duration. A 49-week trial of a specific mycelial preparation in mild Alzheimer's disease does not answer the question for healthy people either. A duration that reliably produces noticeable everyday benefits has not been established.

References

7 sources.

Koichiro Mori; Satoshi Inatomi; Kenzi Ouchi; Yoshihito Azumi; Takashi Tuchida. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. 2009. doi:10.1002/ptr.2634
Yuusuke Saitsu; Akemi Nishide; Kenji Kikushima; Kuniyoshi Shimizu; Koichiro Ohnuki. Improvement of cognitive functions by oral intake of Hericium erinaceus.. 2019. doi:10.2220/biomedres.40.125
Mayumi Nagano; Kuniyoshi Shimizu; Ryuichiro Kondo; Chickako Hayashi; Daigo Sato; Katsuyuki Kitagawa; Koichiro Ohnuki. Reduction of depression and anxiety by 4 weeks Hericium erinaceus intake.. 2010. doi:10.2220/biomedres.31.231
I-Chen Li; Han-Hsin Chang; Chuan-Han Lin; Wan-Ping Chen; Tsung-Han Lu; Li-Ya Lee; Yu-Wen Chen; Yen-Po Chen; Chin-Chu Chen; David Pei-Cheng Lin. Prevention of Early Alzheimer's Disease by Erinacine A-Enriched Hericium erinaceus Mycelia Pilot Double-Blind Placebo-Controlled Study. 2020. doi:10.3389/fnagi.2020.00155
Koichiro Mori; Haruhisa Kikuchi; Yutaro Obara; Masaya Iwashita; Yoshihito Azumi; Satomi Kinugasa; Satoshi Inatomi; Yoshiteru Oshima; Norimichi Nakahata. Inhibitory effect of hericenone B from Hericium erinaceus on collagen-induced platelet aggregation.. 2010. doi:10.1016/j.phymed.2010.05.004
J. Koga; R. G. Thorn; E. Langer. A multilocus phylogeny of Hericium (Hericiaceae, Russulales). 2025. doi:10.3114/persoonia.2025.55.04
Mendel Friedman. Chemistry, Nutrition, and Health-Promoting Properties of Hericium erinaceus (Lion's Mane) Mushroom Fruiting Bodies and Mycelia and Their Bioactive Compounds. 2015. doi:10.1021/acs.jafc.5b02914

Legal notice: The depiction of historical significance and traditional use is context within our encyclopedia and not a health claim for any product, not a treatment promise, and not a substitute for medical advice. What may be stated on product labels, product pages, or in advertising is governed by the applicable legal requirements.