A standard 65 mg iron tablet already exceeds the NIH's adult limit, and federal law requires an overdose warning on every bottle. Here's what the evidence shows.
FDA warning
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NAC: The FDA-Approved Tylenol Antidote It Tried to Ban as a Supplement
NAC is the hospital antidote for a Tylenol overdose, yet the FDA spent two years trying to remove it from supplement shelves. Here's what happened, and why. -
Biotin for Hair, Skin and Nails: The FDA Warning Behind the Hype
NIH says biotin deficiency in a healthy adult has never been reported, yet high-dose biotin supplements can distort blood tests badly enough to mask a heart attack.