500 mg · vegan · gluten-free · 60 caps
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L-Cystine is a amino acid & hair supplement. L-cystine is the stable disulfide-bonded dimer of cysteine, the key structural amino acid of keratin in hair and nails. Used in adult dosing protocols in India and internationally, it is sold as a single-ingredient supplement.
Cystine supplies the disulfide bonds that give hair and nails their strength; supplementation (often with B vitamins) supports hair density and reduces breakage. Effects are dose-dependent and typically measurable within 8-12 weeks.
Adults with brittle hair/nails or diffuse hair shedding seeking a keratin building block.
Generally well tolerated. Drink adequate water (sulfur amino acid). Caution in cystinuria.
Flexible — works in any of the above.
SacredBod's longer take on L-Cystine — context the structured blocks above don't capture.
Disulfide amino acid L-cystine for hair, nail and keratin structure..
Cystine supplies the disulfide bonds that give hair and nails their strength; supplementation (often with B vitamins) supports hair density and reduces breakage. Effects are dose-dependent and typically measurable within 8-12 weeks.
Adults with brittle hair/nails or diffuse hair shedding seeking a keratin building block.
Generally well tolerated. Drink adequate water (sulfur amino acid). Caution in cystinuria.
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