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Cysteine hair relaxers, perms ?
How does it work?
I find it hard to believe that just adding an amino acid (cysteine) can have such an effect on hair.
Do other ingredients make it work?https://www.cosmeticsandtoiletries.com/formulating/category/haircare/231624001.html
https://www.wacker.com/cms/en/industries/consumer_care/personal_care/hair_care/perm/perm.jsp
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3 Replies
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I was considering hair straightening and read about options. Customer reviews say that the effect of cysteine is minimum compared to keratin treatment and isn’t worth the money.
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I would expect that adding cysteine to the formulation for use on newly straightened hair or maybe before straightening it, as the cysteine in the product itself would create cysteine bridges.It should in theory bind to the free cysteine in the hair (for which disulfide bridges were reduced with the straightening iron) and reduce the recurrence of curls.
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here’s your answer:“The system then uses high concentrations of cystine, a major component
of human hair. This is incorporated as Croda’s ingredient Crodasone Cystine (INCI: Cystine Bis-PG- Propyl Silanetriol (and) Water (aqua)),
a copolymer of amino acids and silanol. Under heat, the silanol
cross-links with the hair fiber to provide a protective shield on the
surface of the hair, while the amino acids enhance the longevity of the
treatment by aiding in the restructuring of the disulfide bonds. The
result is sleeker, smoother hair that requires less time and effort to
dry and style.”
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