Reishi review & buying guide
Updated October 2026 · How we review
What it's been studied for
Sleep, stress and immune support in traditional use; human evidence is limited.
What to look for
Fruiting body extracts, often labeled with beta-glucan content; also teas and powders.
- Plant part and extract ratio or standardization on the label
- Amount per serving in milligrams
- Third-party testing (USP Verified or NSF)
- No claims to cure or treat disease
Cautions
May slow blood clotting and lower blood pressure. Rare liver problems have been reported with powdered forms. Ask a doctor if you take blood thinners or blood pressure medicines.
For general supplement information, see the NIH Office of Dietary Supplements.
Compare reishi supplements
These links open Amazon search results so you can compare labels using our checklist. We have not lab-tested these products.
As an Amazon Associate, we earn from qualifying purchases.Important: These statements have not been evaluated by the Food and Drug Administration. Products discussed are not intended to diagnose, treat, cure or prevent any disease. This site is for general information only and is not medical advice. Talk with your doctor or pharmacist before starting a supplement, especially if you are pregnant or breastfeeding, take medication, or have a health condition.