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July 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
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January 2011 in “Journal of X-ray science and technology” Perming and bleaching damage hair differently, with bleached hair having more cysteic acid in the cuticle.
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May 2019 in “PLOS genetics” Mutations in the HEPHL1 gene cause abnormal hair and cognitive issues.
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June 1983 in “Journal of Neurochemistry” Copper therapy improved health and enzyme activity in mice with copper deficiency.
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November 2008 in “The journal of investigative dermatology/Journal of investigative dermatology” Cystatin M/E helps in the final stages of hair and nail formation by controlling certain enzymes.
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January 2011 in “Intestinal Research” Cronkhite-Canada syndrome can cause multiple gastrointestinal polyps and various physical symptoms.