January 2005 in “Digital Access to Scholarship at Harvard (DASH) (Harvard University)” The FDA struggles to regulate hair loss supplements due to a law allowing unproven claims.
February 1999 in “Strength and Conditioning Journal” Androstenedione, a hormone supplement, doesn't improve muscle or performance and can cause harmful side effects.
67 citations
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January 2007 in “Environmental health perspectives” A woman's health issues were caused by arsenic poisoning from kelp supplements.
78 citations
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December 2011 in “Clinical toxicology” Excessive selenium from a supplement caused toxicity but patients recovered with care.
140 citations
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January 2021 in “Journal of the International Society of Sports Nutrition” Creatine is safe, not a steroid, and boosts muscle and performance without causing kidney damage or hair loss.