115 citations
,
December 1996 in “PubMed” The safe daily selenium intake is up to 819 micrograms.
55 citations
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February 1990 in “Journal of Nutrition” Selenium in hair and nails is higher with L-selenomethionine and low methionine.
4 citations
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January 1989 Hair and nails can indicate selenium levels in the body.
7 citations
,
January 1995 in “Journal American Society of Mining and Reclamation” Excess selenium and sulfur in plants can harm animals, causing symptoms like hair loss and poor reproduction.
12 citations
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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.