Roll Call

Shiitake Mushroom — answers to shiitake

Varies by source

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An edible mushroom (Lentinula edodes) used in cooking and traditional medicine, and sold as a dietary supplement, sometimes standardized for a compound called lentinan.

Why it’s used

Taken to support immune function.

What the evidence says

Most human research involves injectable lentinan extract used in specific clinical contexts rather than oral shiitake supplements. Evidence that oral shiitake supplements support immune function in general populations is limited.

Context

Human trials of shiitake-derived extracts have used varying doses and durations, and results are difficult to compare directly to whole-mushroom supplement products sold over the counter.

Evidence: weakThe claim is made, but the evidence behind it is poor.

Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.