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Why are most dietary supplements not evaluated by the FDA?

Is it difficult to scientifically determine if dietary supplements (such as St. John's Wort) help the body? Why do so many labels still say "This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease" even though the supplement has been used for decades or even centuries?


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Barbara Bethard (RNMSN) says

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2 years ago
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