April 2024 in “Current research in nutrition and food science” Taking an amino acid supplement improved skin, hair, and nail health in women.
June 2023 in “Skin Research and Technology” The supplement with amino acids, iron, selenium, and marine hydrolyzed collagen improved hair growth more than drug treatment alone, with most people tolerating it well.
August 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
January 2017 in “Seoul National University Open Repository (Seoul National University)” AIMP1 can boost hair growth by increasing stem cell activity.
July 2009 in “International Journal of Cosmetic Science” Japanese women's curved hair has an uneven internal structure and varied amino acid composition.
March 2005 in “Journal of the American Academy of Dermatology” Adding amino acids to damaged hair can improve its strength and appearance.
17 citations
,
November 1982 in “Annals of Internal Medicine” 5-aminosalicylic acid enemas may cause hair loss.
March 1983 in “Annals of Internal Medicine” 5-Aminosalicylic acid enemas may cause immediate hair root damage and hair loss.
80 citations
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December 1996 in “Pain” Disruption of glycinergic circuits increases pain sensitivity, suggesting new pain treatment options.
38 citations
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May 2000 in “Livestock production science” Giving high-quality protein or methionine supplements helps improve hair growth in Angora goats and, to a lesser extent, in Cashmere goats.
28 citations
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September 2002 in “The Journal of Comparative Neurology” Presynaptic inhibition of certain nerve fibers in cats is mainly controlled by GABA and glycine.
15 citations
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October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
14 citations
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November 2015 in “Annals of the New York Academy of Sciences” Changing the diet of mice lacking the enzyme CBS can affect symptoms related to the genetic condition.
11 citations
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October 1941 in “Experimental Biology and Medicine” PABA helps prevent gray hair and hair loss in mice.
10 citations
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March 2016 in “Toxicology and applied pharmacology” Using A132 hair dye with sunlight can cause skin damage and hair loss.
8 citations
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October 2019 in “The Journal of surgical research/Journal of surgical research” Sodium valproate helps skin healing by affecting GABA and histone deacetylase.
4 citations
,
December 2014 in “European Journal of Chemistry” Iron chloride helps create compounds that could be useful in medicine, like treating hair loss.
August 2025 in “Frontiers in Nutrition” Leucine levels may affect hair loss after bariatric surgery.
March 2022 in “Annals of Bariatric Surgery” Protein supplements with zinc, iron, and B vitamins reduce hair loss after sleeve gastrectomy.
April 2021 in “Research Square (Research Square)” The new cocrystal KET-PABA is a more effective and safe anti-inflammatory treatment for skin conditions in mice.
October 2020 in “The American journal of gastroenterology” Para-aminobenzoic acid in hair supplements can cause autoimmune hepatitis.
238 citations
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May 1989 in “Journal of Investigative Dermatology”
12 citations
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August 1984 in “Genetics Research” The N gene affects the protein makeup of mouse hair.
11 citations
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November 1966 in “Experimental Biology and Medicine” Hair diameter can indicate protein status in malnourished children if sample location is controlled.
8 citations
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July 1997 in “Archives of Gerontology and Geriatrics” 5 citations
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January 2011 in “International Journal of Cosmetic Science” 1,2,3,4-tetrahydroquinoline compounds are great for stable, pure blue hair dye.
2 citations
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October 2023 in “Animals” Lacto-fermentation changes amino acid profiles in bovine colostrum, but results are inconsistent.
February 2025 in “International Journal of Cosmetic Science” A new amino acid derivative, ATS, improves hair texture and moisture, making it easier to straighten curly hair.
Using enzymes to link proteins makes hair repair treatments more effective and long-lasting.
43 citations
,
April 2005 in “The Journal of Dermatology” Biotin supplements improved skin and hair in a biotin-deficient infant on amino acid formula.