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    Did you mean Cysteine?
    Glossary Cysteine

    amino acid crucial for protein structure and hair strength

    Cysteine is an amino acid that plays a crucial role in the structure and function of proteins, including those in hair. It contains a sulfur atom, which allows it to form strong disulfide bonds, contributing to the strength and stability of hair keratin. This makes cysteine important for maintaining healthy hair and can be a focus in treatments for conditions like alopecia.

    Related Terms

    Learn 2

    1. L-cysteine
    2. acetyl cysteine

    Research 10 of 1000+

    1. Characterisation of an Ovine Keratin Associated Protein (KAP) Gene, Which Would Produce a Protein Rich in Glycine and Tyrosine, but Lacking in Cysteine Genes · 2019 · 24 citations
    2. Cysteine and Glutamine level in hair shaft fractures patients International Journal of Dermatology Venereology and Leprosy Sciences · 2024 · 1 citations
    3. Structure and expression of genes for a class of cysteine-rich proteins of the cuticle layers of differentiating wool and hair follicles. 1990 · 67 citations
    4. Chemoprevention of smoke-induced alopecia in mice by oral administration of l-cystine and vitamin B6 Journal of dermatological science · 2007 · 41 citations
    5. Cysteine Prevents the Reduction in Keratin Synthesis Induced by Iron Deficiency in Human Keratinocytes Journal of Cellular Biochemistry · 2015 · 40 citations
    6. Ultrastructural Localization of S100A3, a Cysteine-rich, Calcium Binding Protein, in Human Scalp Hair Shafts Revealed by Rapid-freezing Immunocytochemistry Journal of Histochemistry & Cytochemistry · 1999 · 40 citations
    7. Gene Expression of Mouse S100A3, a Cysteine-Rich Calcium-Binding Protein, in Developing Hair Follicle 1998 · 40 citations
    8. Convergent Evolution of Cysteine-Rich Keratins in Hard Skin Appendages of Terrestrial Vertebrates Molecular biology and evolution · 2019 · 36 citations
    9. Protein disulphide isomerase-mediated grafting of cysteine-containing peptides onto over-bleached hair Biocatalysis and biotransformation · 2011 · 28 citations
    10. Adenosine stimulates growth of dermal papilla and lengthens the anagen phase by increasing the cysteine level via fibroblast growth factors 2 and 7 in an organ culture of mouse vibrissae hair follicles International Journal of Molecular Medicine · 2011 · 28 citations
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    Community 10

    1. Any clinical study on cysteine alone for hair loss? Reddit · 22 Mar 2025
    2. Efficacy and Tolerability of N-Acetyl-Cysteine for Treatment of The Early-onset Androgenetic Alopecia in Men Reddit · 3 Jan 2022
    3. Clinical Trial: N-Acetyl-Cysteine for Treatment of AGA in Men Reddit · 20 Jan 2021
    4. Protein's role in hair growth is more nuanced than just quantity Reddit · 22 Apr 2026
    5. Can amino acids help with AGA Reddit · 1 Apr 2024
    6. This may be common news to some, but I’ve just learned the importance of amino acids for hair growth / strength. Reddit · 28 Sept 2022
    7. Please Help! I’m 2x with Hair Loss, and been using Minoxidil but got side effect :(( Community · 23 Oct 2025
    8. Has anyone tried collagen supplements? Reddit · 9 Apr 2017
    9. Losing ground after 14 months of fin use and 11 months of min Reddit · 20 Jul 2022
    10. Let Me Sell You on NAC Reddit · 23 Apr 2019