Selenium can be toxic to animals, causing serious health issues, especially in horses.
28 citations
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March 1986 in “The American journal of medicine” Too much vitamin A can cause liver damage and skin issues.
30 citations
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October 2013 in “BMC dermatology” VEGF gel increases hair growth but may have potential toxicity.
4 citations
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April 2016 in “Journal of Dermatology Research and Therapy” Anti-androgens are safe and effective for treating moderate to severe adult female acne.
June 2021 in “Current developments in nutrition” High doses of finasteride lower cholesterol and body weight in certain mice.