618 citations
,
January 2018 in “Cochrane Database of Systematic Reviews” Selenium supplements do not prevent cancer and may increase certain health risks.
382 citations
,
February 2010 in “Archives of Internal Medicine” A manufacturing error in a dietary supplement caused severe selenium poisoning, affecting many people and highlighting the need for stricter quality control.
115 citations
,
December 1996 in “PubMed” The safe daily selenium intake is up to 819 micrograms.
93 citations
,
March 2014 in “Cochrane Database of Systematic Reviews” Selenium supplements do not prevent cancer and may have harmful effects.
79 citations
,
April 1996 in “JAMA” Taking too many selenium supplements can cause serious health problems like hair loss and fatigue.
71 citations
,
June 2008 in “Annals of Internal Medicine” Excessive selenium from supplements can be harmful.
55 citations
,
February 1990 in “Journal of Nutrition” Selenium in hair and nails is higher with L-selenomethionine and low methionine.
35 citations
,
January 2001 in “Journal of Animal Science” High dietary selenium, especially inorganic, causes weight loss and selenosis in pigs, with effects varying by hair color.
35 citations
,
April 1956 in “Journal of the American Medical Association” Selenium sulfide shampoo can cause hair loss, which stops when you stop using it.
27 citations
,
June 2010 in “Journal of the American Academy of Dermatology” Excessive selenium in supplements can cause hair loss and nail issues.
23 citations
,
October 1995 in “PubMed” Selenium exposure at work caused the worker's complete hair loss.
23 citations
,
August 1989 in “American Journal of Veterinary Research” High selenium diets in pigs cause health issues like weight loss, hair loss, and nerve damage.
21 citations
,
June 1991 in “Journal of Inherited Metabolic Disease” Selenium deficiency caused symptoms in a child, which improved with selenium supplements.
20 citations
,
August 1960 in “PubMed” Selenium sulfide may affect hair root health.
18 citations
,
September 2011 in “Livestock science” Maternal Nano-Se supplements improve fetal hair follicle development in cashmere goats.
16 citations
,
May 2019 in “Hormone and Metabolic Research” Selenium might help with insulin resistance and cholesterol in PCOS, but more research is needed to confirm its benefits.
16 citations
,
December 2005 in “Journal of Animal Physiology and Animal Nutrition” Moderate selenium levels in a dog's diet are best for hair growth.
16 citations
,
January 1996 Selenium levels in Enshi District need careful monitoring to prevent health issues.
15 citations
,
July 1984 in “Nutrition Research” Selenium increased in hair but not in blood after taking supplements.
15 citations
,
March 1997 in “International Journal of Dermatology” Selenium sulfide in anti-dandruff shampoos can turn hair green.
13 citations
,
October 1960 in “Experimental Biology and Medicine” Selenium-75 stays in dog hair for up to 316 days.
12 citations
,
July 1964 in “Archives of Dermatology” Selenium sulfide shampoo doesn't affect hair growth or rest phases.
11 citations
,
January 1993 in “Journal of Veterinary Diagnostic Investigation” Horses in western Iowa got sick from high selenium in local alfalfa hay.
9 citations
,
September 1989 in “PubMed” Sudanese children with severe malnutrition have low selenium levels, which may affect their recovery.
7 citations
,
March 2023 in “European Journal of Dermatology” Using Selenium Disulfide shampoo weekly helps prevent scalp dermatitis flare-ups.
6 citations
,
March 2011 in “Experimental Dermatology” Too much or too little selenium in the diet can cause hair loss and graying in mice.
5 citations
,
July 2019 in “Nutrients” Low selenium intake may delay puberty in boys but not in girls.
2 citations
,
October 1961 in “Experimental Biology and Medicine” Natural feedstuffs help reduce muscular dystrophy in rabbits more than selenium or vitamin E alone.
2 citations
,
February 1983 in “International Journal of Cosmetic Science” Selenium disulphide detergents increase hair oiliness by boosting some lipids and reducing fatty acids.
1 citations
,
August 2023 in “Journal of cosmetic dermatology (Print)” Too much selenium can cause hair loss and nail problems.