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Which supplements are most likely to send you to the hospital?

About 23,000 people are sent to the emergency room every year from supplements. Supplements are not regulated drugs because of the way they're defined by the US Food and Drug Administration, so a supplement is only deemed unsafe once a supplement is proven to cause significant harm. According to Harvard professor Bryn Austin, there are three categories for the most dangerous supplements on the market: those for muscle building, sexual performance, and weight loss.

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