27 citations
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June 2010 in “Journal of the American Academy of Dermatology” Excessive selenium in supplements can cause hair loss and nail issues.
32 citations
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January 2006 in “Liver transplantation” Vitamin A toxicity can cause severe health issues and may require a liver transplant if other treatments fail.
26 citations
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January 2018 in “Skin appendage disorders” Thallium, mercury, selenium, and colchicine strongly cause hair loss.
6 citations
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December 2014 in “PubMed” A supplement for hair loss with green tea in it may cause liver problems.
79 citations
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April 1996 in “JAMA” Taking too many selenium supplements can cause serious health problems like hair loss and fatigue.