Literature scope
No source is listed in the source list on this page. The direct answer uses two filed source pages for Cordyceps powder and foraged medicinal fungi. Those pages are not a market test of finished lion’s mane, reishi, or chaga extract lots.
Direct answer
For the question of whether mushroom supplements contain heavy metals, this row is lion’s mane, reishi, cordyceps, and chaga extracts, and it does not name retail brands. Gao et al. 2025 reported 16.36 mg/kg total arsenic in wild Cordyceps sinensis powder from Qinghai, with an arsenite to arsenate ratio of 1:2, and that source page states the material is not a finished dietary supplement lot sold in the United States (Wild Cordyceps sinensis exhibits far lower arsenic accumulation and hepatorenal toxicity in mice compared to equivalent dose of inorganic arsenic, DOI 10.3389/fphar.2025.1625045). Falandysz et al. 2020 measured total mercury in foraged Yunnan fungi, including 0.11 +/- 0.01 mg/kg dry weight in Ganoderma applanatum and 0.012 +/- 0.002 mg/kg dry weight in Ganoderma kunmingense, and assumed three 0.5 g portions of capsulated dried product per day; that source page does not report a finished lion’s mane, reishi, or chaga supplement lot (Mercury in traditionally foraged species of fungi (macromycetes) from the karst area across Yunnan province in China, DOI 10.1007/s00253-020-10876-6).
v2.2 Step Zero scaffold — Category 16 (Dietary Supplements (Human)), Row 23. New row from the 2026-06-09 whole-taxonomy completeness audit; carries no candidate values yet. Routing destination; sources populate it as ingest proceeds, then synthesis fills the evidence sections.
Sources
Update history
The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.