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L-cysteine

Amino acid crucial for protein structure and hair strength

Cysteine is a semiessential proteinogenic amino acid with the formula HS−CH2−CH(NH2)−COOH. The thiol side chain in cysteine enables the formation of disulfide bonds, and often participates in enzymatic reactions as a nucleophile. Cysteine is chiral, but both D- and L-cysteine are found in nature. L‑Cysteine is a protein monomer in all biota, and D-cysteine acts as a signaling molecule in mammalian nervous systems. Cysteine is named after its discovery in urine, which comes from the urinary bladder or cyst, from Greek κύστις kýstis, "bladder".

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Research 10

  1. Antioxidant N-acetyl-L-cysteine ameliorates symptoms of premature aging associated with the deficiency of the circadian protein BMAL1Aging · 2009 · 159 citations
  2. In vitro methodology, hormonal and nutritional effects and fibre production in isolated ovine and caprine anagen hair folliclesanimal · 2010 · 11 citations
  3. Hydrogen Sulfide Disturbs Actin Polymerization via S-Sulfhydration Resulting in Stunted Root Hair GrowthPLANT PHYSIOLOGY · 2018 · 97 citations
  4. Cysteine Prevents the Reduction in Keratin Synthesis Induced by Iron Deficiency in Human KeratinocytesJournal of Cellular Biochemistry · 2015 · 62 citations
  5. Investigation of Some Amino Acid Analogues and Metabolites as Inhibitors of Wool and Hair GrowthAustralian Journal of Biological Sciences · 1983 · 7 citations
  6. Chemoprevention of smoke-induced alopecia in mice by oral administration of l-cystine and vitamin B6Journal of Dermatological Science · 2007 · 51 citations
  7. Influence of FHIT on benzo[ a ]pyrene-induced tumors and alopecia in mice: Chemoprevention by budesonide and N -acetylcysteineProceedings of the National Academy of Sciences · 2006 · 26 citations
  8. Drug-Induced Postinfantile Giant Cell HepatitisHepatology · 2010 · 11 citations
  9. Deciphering cysteamine’s impact on cashmere-producing traits of cashmere goats: a transcriptomic and metabolomic perspectiveFrontiers in Veterinary Science · 2026
  10. Psychoactive drugs and skinJournal of the European Academy of Dermatology and Venereology · 2003 · 15 citations
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Posts 2

  1. Efficacy and Tolerability of N-Acetyl-Cysteine for Treatment of The Early-onset Androgenetic Alopecia in MenReddit · 3 Jan 2022
  2. Bosley Hair Growth SupplementsReddit · 29 Mar 2022
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