Medicinal Mushrooms vs Adaptogen Herbs
How medicinal mushrooms such as reishi differ from adaptogen herbs such as ashwagandha, what "adaptogen" means to a regulator, and what the sources say about stress evidence and safety for each.
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.
Medicinal mushrooms and adaptogen herbs are often sold side by side for stress, sleep and energy. They are different kinds of organisms, with different bodies of research and different safety notes. We searched PubMed for a head-to-head human trial of reishi against ashwagandha and found none: Proper evidence not found. This page keeps the two apart and compares only what each source actually says.
General education, not medical advice. A pharmacist or clinician who knows your medicines and health decides what is right for you.
What each one is
| Medicinal mushrooms (example: reishi) | Adaptogen herbs (example: ashwagandha) | |
|---|---|---|
| Living group | Fungi. GBIF lists Ganoderma lucidum (Polyporaceae) in kingdom Fungi. [1] | Plants. GBIF lists Withania somnifera (Solanaceae) in kingdom Plantae. [2] |
| Part usually sold | Fruiting body, mycelium or grain-grown mycelium; see Fruiting Body vs Mycelium. | NCCIH: supplements typically contain ashwagandha root, leaf, or root/leaf extracts. [3] |
| Traditional use | Reishi is used in traditional Chinese medicine, according to the LiverTox entry. [4] | NCCIH says ashwagandha has long been used in traditional Ayurvedic medicine. [5] |
Traditional use is not evidence that a product works. It tells you how a plant or fungus has been used, not what a trial found. See Traditional Uses vs Clinically Supported Uses.
What "adaptogen" does and does not mean
A 2021 review describes adaptogens as a category of herbal medicinal and nutritional products promoting adaptability, resilience and survival in stress. [6] The European Medicines Agency's herbal committee (HMPC) wrote in 2008 that the term is not accepted in the pharmacological and clinical terminology commonly used in the EU, and that the principle needs further clarification and study. [7] Whether mushrooms belong in the category is not described in the sources we read for the concept. The word "adaptogenic" appears on some mushroom products and in some trial titles; treat it as a marketing or research label, not a regulator's finding. For the herb side, see What Are Adaptogens?.
What research shows for stress, fatigue and sleep
| Product and form | What the source found | Strength of evidence |
|---|---|---|
| Reishi (Ganoderma lucidum) polysaccharide extract | In 132 patients with neurasthenia, 8 weeks of the extract gave significantly lower global severity and fatigue scores than placebo. [8] | Promising but limited: one trial, one diagnosis. |
| Reishi, all trials pooled | A GRADE review of 17 trials (971 participants) rated the evidence quality very low across all outcomes. [9] | Insufficient evidence overall. |
| A mushroom blend product | In a 50-person, 12-week randomized trial, anxiety scores fell more than with placebo. [10] The contents of the blend and funding are not given in the abstract we read. | Promising but limited; applies only to that product. |
| Ashwagandha (Withania somnifera) | NCCIH: some preparations may be effective for insomnia and stress; evidence on anxiety is unclear. [3] A meta-analysis found 9 randomized trials with 558 patients. [11] NCCIH notes many studies were small and used varied preparations. [3] | Promising but limited, with mixed anxiety findings. |
| Reishi vs ashwagandha directly | Proper evidence not found. | Insufficient evidence. |
The amounts and products differ in every row, so the rows cannot be ranked against each other. For the full pages see Reishi for Sleep and Stress, Mushrooms for Stress and Emotional Wellbeing and Ashwagandha.
No universal winner
Mushrooms and adaptogen herbs are not rivals with a scoreboard. They are different products with different evidence and different risks. The herb side is covered at Adaptogens, and the mushroom side by goal at Mushrooms by Wellness Goal.
Frequently asked questions
Are medicinal mushrooms adaptogens?
Not settled in the sources we read. The HMPC said in 2008 the term is not accepted in EU pharmacological and clinical terminology. [7] Some mushroom products are marketed as adaptogenic, which is a marketing or research label.
Is reishi better than ashwagandha for stress?
Proper evidence not found. We searched PubMed for a direct comparison and found none. Each has its own limited trials. [8] [3]
Which is safer, reishi or ashwagandha?
No source we read compares them directly. Each has documented rare liver reports, and ashwagandha has additional cautions listed by NCCIH. [15] [13]
Can I take a mushroom and an adaptogen herb together?
Proper evidence not found on combining them. Ask a pharmacist who can check your medicines, and tell the surgical team about both before an operation. [16]
Does "traditional use" mean it works?
No. Traditional use describes how something has been used, and research findings are separate. See Traditional Uses vs Clinically Supported Uses.
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.
Safety: documented points for each
- Ashwagandha (NCCIH): rare cases link liver injury to ashwagandha supplements. [12] It should be avoided in pregnancy and not used while breastfeeding, and is not recommended before surgery or with autoimmune or thyroid disorders. [13] NCCIH lists possible interactions with diabetes and blood pressure medicines, immunosuppressants and sedatives, among others. [14]
- Reishi: the NIH LiverTox entry says it has been implicated in rare single instances of acute liver injury, and that in most reports other diagnoses were not adequately excluded. [15] Pregnancy and breastfeeding for reishi are not described in the sources we read. See Reishi Side Effects and Liver Injury Reports.
- Both: tell the surgical team about all supplements, and ask a pharmacist about medicines. [16] See How Interactions Work. Labels may not match contents. [17] A US study of reishi products found none of the manufactured products held Ganoderma lucidum in the strict sense. [18]
- If you feel unwell after any product, stop and speak to a clinician or pharmacist, and do not change prescribed medicines without asking the prescriber.
References
- GBIF Secretariat, GBIF Backbone Taxonomy match for Ganoderma lucidum. Read 2026-10-23.
- GBIF Secretariat, GBIF Backbone Taxonomy match for Withania somnifera. Read 2026-10-23.
- National Center for Complementary and Integrative Health, Ashwagandha: Usefulness and Safety. Read 2026-10-23.
- U.S. National Institute of Diabetes and Digestive and Kidney Diseases, LiverTox: Lingzhi, Reishi (record of the LiverTox entry, 2012). Read 2026-10-23.
- National Center for Complementary and Integrative Health, Ashwagandha: Usefulness and Safety. Read 2026-10-23.
- Panossian AG et al., Evolution of the adaptogenic concept from traditional use to medical systems. Med Res Rev 2021. Read 2026-10-23.
- European Medicines Agency, Committee on Herbal Medicinal Products (HMPC), Reflection paper on the adaptogenic concept (EMEA/HMPC/102655/2007, 2008). Read 2026-10-23.
- A randomized, double-blind and placebo-controlled study of a Ganoderma lucidum polysaccharide extract in neurasthenia. J Med Food 2005. Read 2026-10-23.
- The Nutritional Significance of Ganoderma lucidum on Human Health: A GRADE-Assessed Systematic Review and Meta-Analysis of Clinical Trials. Food Sci Nutr 2025. Read 2026-10-23.
- Adaptogenic Effects of Mushroom Blend Supplementation on Stress, Fatigue, and Sleep: A Randomised, Double-Blind, and Placebo-Controlled Trial. Brain Behav 2026. Funding and blend contents are not given in the abstract we read. Read 2026-10-23.
- Effects of Ashwagandha (Withania Somnifera) on stress and anxiety: A systematic review and meta-analysis. Explore 2024. Read 2026-10-23.
- National Center for Complementary and Integrative Health, Ashwagandha: Usefulness and Safety. Read 2026-10-23.
- National Center for Complementary and Integrative Health, Ashwagandha: Usefulness and Safety. Read 2026-10-23.
- National Center for Complementary and Integrative Health, Ashwagandha: Usefulness and Safety. Read 2026-10-23.
- U.S. National Institute of Diabetes and Digestive and Kidney Diseases, LiverTox: Lingzhi, Reishi (record of the LiverTox entry, 2012). Read 2026-10-23.
- National Center for Complementary and Integrative Health, Using Dietary Supplements Wisely. Read 2026-10-23.
- National Center for Complementary and Integrative Health, Using Dietary Supplements Wisely. Read 2026-10-23.
- Identifying the "Mushroom of Immortality": Assessing the Ganoderma Species Composition in Commercial Reishi Products. Front Microbiol 2018. Read 2026-10-23.