Selenium can be toxic to animals, causing serious health issues, especially in horses.
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.
30 citations,
January 2023 in “EFSA journal” Adults should not consume more than 255 micrograms of selenium per day to avoid risk of hair loss and other side effects.
36 citations,
January 2010 in “Human & experimental toxicology” Eating paradise nuts led to selenium poisoning, causing nausea, hair loss, and other symptoms in two women.
20 citations,
February 2013 in “Nutrition” Selenium-enriched green tea might be a safe prebiotic for gut health.