Mushroom

Reishi

Ganoderma lucidum mushroom

A glossy, reddish-brown mushroom used for centuries in traditional Chinese, Japanese and Korean practice.

Evidence
T Long traditional use; little research in healthy people
Studied for
Immune support and stamina (traditional use)

What studies found

Reishi has a long history of traditional use for immunity, strength and stamina. Human research is limited, and most of it was done in people with serious illnesses, not healthy adults. There's no good evidence yet that reishi supports immunity or energy in healthy people.

How much is in our products

ProductAmount
Mushroom Gummies 300 mg per 2-gummy serving

In studies: Studies used many different extracts and amounts, so there is no clear studied amount to compare with.

Who should take care

Reishi may add to bleeding risk with blood thinners, lower blood pressure with blood pressure medicines, and lower blood sugar with diabetes medicines. Liver problems, nausea, trouble sleeping and diarrhea have been reported. There's no safety information for pregnancy or breastfeeding. Skip it if you're allergic to mushrooms or molds.

Talk to your doctor or pharmacist before starting a supplement if you take any medicine, are pregnant or breastfeeding, or have a health condition.

Read more in our guides

Sources

  1. Merck Manual Professional Version 2025. Reishi

This page is for general education and isn't medical advice. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.