Traditional Uses vs. Clinically Supported Uses
How the long traditional use of medicinal mushrooms in named regions differs from what modern trials have tested, with examples for reishi, cordyceps, turkey tail, chaga and lion's mane.
Content last updated . This page has not been medically reviewed.
Safety first. Supplements can cause side effects and interact with medicines. Read mushroom safety and interactions before you use any mushroom product.
Traditional use and clinical evidence answer different questions. Traditional use tells us that people in a particular place and period used a mushroom for certain purposes. Clinical evidence tells us what happened when a defined product was given to a defined group of people and compared with something else. Neither one replaces the other: a tradition is not proof that a product works, and a lack of trials is not proof that it does not. This page keeps the two apart, mushroom by mushroom.
Information here is general education, not medical advice. A pharmacist or clinician who knows your medicines and conditions should guide any decision.
Two kinds of knowledge
Traditional use is knowledge held in communities and written traditions. In the sources we read, it is described for China, Japan, Korea, Russia and other northern European countries, and for Native American and East Asian systems. [1][2][3] Clinical evidence comes from trials and reviews. One caution applies to both: supplements you buy may differ in important ways from products tested in studies. [4]
Side by side: five examples
The "traditional use" column describes what a source says people used the mushroom for. It is not an endorsement. The evidence labels are ours, based only on the sources listed.
| Mushroom | Traditional use, as a source describes it | What research found | Evidence label |
|---|---|---|---|
| Reishi (Ganoderma lucidum, fruiting body) | Holds an important place in the traditional medical systems of China, Japan, Korea and other Asian countries. [1] | A Cochrane review did not find sufficient evidence to justify reishi as a first-line cancer treatment, and rated the quality of the trials as generally unsatisfying. [5] Randomized trials did not support its use for cardiovascular risk factors in type 2 diabetes. [1] | Insufficient evidence; mixed |
| Cordyceps (as described by a cancer center) | Used in traditional Chinese medicine for fatigue, sexual dysfunction and coughs, among other conditions. [6] | Studies of exercise performance in healthy people gave mixed results. [6] | Mixed |
| Turkey tail (Trametes versicolor) | Used in traditional Chinese medicine as a tonic. [7] | A product called PSK, derived from the mushroom, was developed for cancer treatment in Japan, and the source notes that confirmatory studies are needed. [7] | Promising but limited (cancer care only, specific extracts) |
| Chaga (Inonotus obliquus) | A folk remedy in Russia and other northern European countries. [2] | Its safety and efficacy have yet to be evaluated in clinical studies. [2] | Traditional use only; preclinical |
| Lion's mane (Hericium erinaceus) | A long history of use in Native American and East Asian medical systems. [3] | A 2025 systematic review found five randomized trials, 15 laboratory studies and three pilot trials. [8] A cancer center calls the clinical data limited. [3] | Promising but limited |
Where to go next
Frequently asked questions
Does a long history of use show that a mushroom works?
No. Traditional use is a reason to study a mushroom, and it is valued in its own right, but it is not a test of effect or safety. A review of one mushroom found the quality of its cancer trials generally unsatisfying, which shows why trials still matter. [5]
Does the lack of trials mean a traditional mushroom does not work?
No. It means the question has not been answered well. For chaga, a cancer center states that safety and efficacy have yet to be evaluated in clinical studies. [2] "Proper evidence not found" is the honest label, not "does not work".
Is a traditional preparation the same as a supplement?
Not necessarily. Products on shelves may differ in important ways from products tested in studies, so neither tradition nor a trial transfers automatically. [4]
Which mushrooms have the most human research?
In the sources we read, lion's mane has a small set of randomized trials and a few pilot trials, and the clinical data are still described as limited. [8][3]
Who should talk to a clinician first?
Anyone taking prescribed medicines, anyone with liver or kidney disease, anyone in cancer care, and anyone planning surgery. Tell the surgical team about supplements as far in advance as possible. [4]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Why a tradition and a trial can disagree
A traditional preparation, a modern capsule and a trial product are three different things. Traditional sources describe the mushroom as used in a community; a trial tests one product made in one way. A result for one species, part or extract should not be moved to another. Names matter too: the accepted scientific names above were checked in the GBIF taxonomy. [9]
Trial design also limits what can be said. A review of medicinal mushroom research calls for high-quality, long-term, randomized, placebo-controlled studies. [10] See Mushroom Research Limitations for more.
Safety: tradition does not make a product safe
"Natural" or "traditional" does not mean safe. Reishi has been reported to increase bleeding risk with anticoagulant and antiplatelet medicines, and liver injury is listed among its possible side effects. [1] Cordyceps may increase the adverse effects of antidiabetic or anticoagulant and antiplatelet drugs. [6] Chaga has been linked to oxalate kidney injury in case reports. [2]
In general, supplements may interact with medicines or carry risks with certain medical problems or before surgery. [4] In the US, FDA is not authorized to approve dietary supplements for safety and effectiveness before they are marketed. [11] Ask a pharmacist or the prescriber before adding any mushroom product, and do not stop or change a prescribed medicine on your own. See How Interactions Work.
References
- Memorial Sloan Kettering Cancer Center. Reishi Mushroom. Read 2026-10-23.
- Memorial Sloan Kettering Cancer Center. Chaga Mushroom. Read 2026-10-23.
- Memorial Sloan Kettering Cancer Center. Lion's Mane Mushroom. Read 2026-10-23.
- National Center for Complementary and Integrative Health (NIH). Using Dietary Supplements Wisely. Read 2026-10-23.
- Jin X, Ruiz Beguerie J, Sze DM, Chan GC. Ganoderma lucidum (Reishi mushroom) for cancer treatment. Cochrane Database Syst Rev. 2016. PubMed 27045603. Read 2026-10-23.
- Memorial Sloan Kettering Cancer Center. Cordyceps. Read 2026-10-23.
- Memorial Sloan Kettering Cancer Center. Coriolus versicolor (Turkey Tail). Read 2026-10-23.
- Menon A, Jalal A, Arshad Z, Nawaz FA, Kashyap R. Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Front Nutr. 2025. PubMed 40959699. Read 2026-10-23.
- GBIF Secretariat. GBIF Backbone Taxonomy. Names checked through the species match API on 2026-10-23. Read 2026-10-23.
- Wasser SP. Medicinal mushrooms in human clinical studies. Part I. Anticancer, oncoimmunological, and immunomodulatory activities: a review. Int J Med Mushrooms. 2017. PubMed 28605319. Read 2026-10-23.
- U.S. Food and Drug Administration. Information for Consumers on Using Dietary Supplements. Read 2026-10-23.