Buying Guides

How to Read a Mushroom Supplement COA

by Sam the FungiPublished June 11, 2026Updated July 15, 20264 min read

A certificate of analysis is only useful if you know which four numbers to check. Walk through a real one with us.

A certificate of analysis, or COA, is the lab report for a specific production lot. Brands that publish them make it possible to verify what is in the bottle instead of trusting the front label.

What a lab report can cover

Beta-glucans, reported separately from total polysaccharides
Starch content, which reveals grain carryover
Heavy metals — lead, arsenic, cadmium, mercury
Microbial and yeast/mold counts

Match the lot number

A COA that does not match the lot printed on your bottle is marketing, not testing. Our tincture's potency report is linked from its product page with the lot it belongs to; the capsule report is available on request.

Disclaimer: 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.

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What a lab report can cover

Match the lot number

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