Scores 35/35 for dosage transparency, 23/25 for a clean formula, 23/25 for label completeness. 2 ingredients disclosed with amounts.
Ranking
Functional mushrooms are one of the fastest-growing supplement categories, and one where two products with the same name can be very different things: a fruiting-body extract, raw powder, or mycelium grown on grain that is mostly starch. The label tells you which one you are buying only if it says so.
We ranked every reishi, lion's mane, cordyceps, chaga, shiitake and turkey tail product sold on iHerb by label quality: what part of the mushroom is used, whether the extract is standardized, and whether every amount is disclosed.
Scores 35/35 for dosage transparency, 23/25 for a clean formula, 23/25 for label completeness. 2 ingredients disclosed with amounts.
Scores 35/35 for dosage transparency, 23/25 for a clean formula, 23/25 for label completeness. 2 ingredients disclosed with amounts.
Scores 35/35 for dosage transparency, 23/25 for a clean formula, 23/25 for label completeness. 2 ingredients disclosed with amounts.
Every product is scored 0–100 from its label data in the NIH Dietary Supplement Label Database: dosage transparency (35 points - are amounts stated per ingredient, or hidden in a proprietary blend?), label completeness (25), formulation cleanliness (25 - fillers, dyes, titanium dioxide and other non-active ingredients) and ingredient profile (15). The Top 10 admits only products scoring 60 or higher; among those, products with a verified retail listing are shown first so the list is one you can act on. No brand can pay to be included or moved up.
There is no official dose for any medicinal mushroom. Studies have used roughly 1–3 g per day of extract, and doses for whole powders run higher. Compare products by extract amount per serving and stated beta-glucan content, not by the blend weight.
Adults interested in functional mushrooms who want to know which part and how much of the mushroom they are getting.
Labels that do not say fruiting body or mycelium, "proprietary mushroom blends" with no per-species amounts, and no stated beta-glucan content. Reishi has rare reports of liver injury; ask a clinician if you take blood thinners.
Neither is automatically better, but they are not the same product. Fruiting-body extracts usually carry more beta-glucans per gram; mycelium on grain includes the grain itself. A good label tells you which one it is and how much.
Beta-glucans are the compounds most studied in medicinal mushrooms. A stated percentage lets you compare products; a label without it cannot be checked.
Products are ranked by SupplementScore, which evaluates label quality across four categories: dosage transparency (35 pts), label completeness (25 pts), formulation cleanliness (25 pts), and ingredient profile (15 pts). The score is based on data from the NIH Dietary Supplement Label Database, not marketing claims.
No. The SupplementScore measures label quality, how transparent, clean, and well-documented a product is. It does not measure clinical efficacy, bioavailability, or third-party testing. A higher score means better label practices, not guaranteed results.
We analyzed 1,090 mushrooms products from the NIH DSLD database, which contains label data for over 116,000 dietary supplements sold in the United States.
This article is for information only and is not medical advice. Talk to a clinician before starting a supplement, especially if you are pregnant, take medication or have a health condition.
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Rankings reflect label quality scores (dosage transparency, cleanliness, ingredient profile) - not clinical efficacy. Read methodology