February 1945 in “New England Journal of Medicine” March 1942 in “The Science News-Letter” 1 citations
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November 2022 in “International journal of trichology” A woman's premature gray hair turned mostly black again after using Greyverse solution and hair supplements for 5 months.
June 2024 in “British Journal of Dermatology” Vitamin B supplements may reverse grey hair.
February 2013 in “Journal of the American Academy of Dermatology” Iron supplements may reverse premature hair graying caused by iron deficiency.