Share ConsumerLab.com's information with family and friends — or just send to yourself. Simply provide an email address below.
You must provide a valid email address.
Your email address*:
Your name*: Send me a copy
Email Address where it's going*:
*Addresses and name will only be used for sending this message.
Additional message (optional):
Your message has been sent. Thanks for sharing!
Reishi Mushroom Supplement Information
Question: Do reishi mushroom supplements boost the immune system, or have other benefits?
Answer: Reishi (Ganoderma lucidum) is an edible mushroom traditionally used in Chinese medicine for a wide range of purported health benefits, such as increasing vitality and strengthening the heart. In the U.S., supplements containing reishi are most commonly promoted for "strengthening" the immune system, as well as for lowering blood sugar, improving cardiovascular function, protecting from liver damage and reducing cancerous tumors.
Compounds in reishi, including certain beta-glucans and ganoderic acids, are thought to be responsible for some of its benefits. However, evidence from clinical trials has been mixed, and one clinical trial in people with gastrointestinal cancer found that taking reishi had negative effects. For details, information about potential safety concerns and side effects, plus our tests and Top Pick among popular products, see the Reishi Mushroom Supplements Review.