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    Glossary Cystine

    amino acid formed by linking two cysteine molecules

    Cystine is an amino acid that forms when two cysteine molecules are linked by a disulfide bond. It is important for the structural stability of proteins, particularly in keratin, which is a key component of hair, skin, and nails. This bond helps maintain the strength and rigidity of these proteins, contributing to the overall health and resilience of hair and other tissues.

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    Research 10 of 538

    1. Chemoprevention of smoke-induced alopecia in mice by oral administration of l-cystine and vitamin B6 Journal of dermatological science · 2007 · 41 citations
    2. [Low dosage retinol and L-cystine combination improve alopecia of the diffuse type following long-term oral administration]. PubMed · 1989 · 16 citations
    3. Cystine-thiamin-containing hair-growth formulation modulates the response to UV radiation in an in vitro model for growth-limiting conditions of human keratinocytes Journal of Photochemistry and Photobiology B-biology · 2018 · 9 citations
    4. Xenobiotics in Vitro: The Influence ofL-Cystine, Pantothenat, and Miliacin on Metabolic and Proliferative Capacity of Keratinocytes Cutaneous and ocular toxicology · 2006 · 9 citations
    5. Determination of Cystine and Cysteine in Altered Human Hair Fibers Analytical Chemistry · 1947 · 9 citations
    6. Utilization of L-Cystine and L- and D-Methionine by Mink during the Period of Intensive Hair Growth Acta agriculturae Scandinavica · 1982 · 7 citations
    7. The Influence of Electrode Potentials on the Extent of Reduction of Cystine in Hair Fibers by Reducing Agents Textile Research Journal · 1955 · 4 citations
    8. Evaluation of a Combination of Cystine, B Vitamins and Minerals, in the Management of Diffuse Hair Loss in Women: A Prospective, Open-Label Study Preprints.org · 2026
    9. Repeatable Perming via Thiol–Michael Click Reaction: Using Amide Derived from Maleic Acid and Cystine Molecules · 2026
    10. Efficacy of Compound GV-350 with Tricofer® Iron, Cystine and Biotin in the Management of Telogen Effluvium in Women with Iron Deficiency 2025
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    Community 2

    1. Please Help! I’m 2x with Hair Loss, and been using Minoxidil but got side effect :(( Community · 23 Oct 2025
    2. Losing ground after 14 months of fin use and 11 months of min Reddit · 20 Jul 2022

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