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Herbal · Various Brands (60%)
St. John's Wort Products
CriticalUnderdosed
What the lab found
60% of tested products failed for hypericin content. 22 of 23 Amazon products failed. 9 products contained synthetic dyes. Responsible for more dangerous drug interactions than any other supplement.
Failure type · Underdosed
Active ingredient measured significantly below the labeled amount — not therapeutic.
Source
Independent lab testing; multiple published case reports