Selenium can be toxic to animals, causing serious health issues, especially in horses.
13 citations,
January 2012 in “International Journal of Trichology” Eating too many paradise nuts for cancer prevention caused a woman to lose all her hair due to selenium poisoning.
78 citations,
December 2011 in “Clinical toxicology” Excessive selenium from a supplement caused toxicity but patients recovered with care.
12 citations,
June 2023 in “Journal of trace elements in medicine and biology” Eating too much selenium can cause bad breath, hair loss, and nail changes, with harmful effects starting at low daily doses.
1 citations,
December 2019 Selenium is essential for health, but too much or too little can cause problems; blood selenium levels are a good measure of intake.