We don’t advise perming hair that has been treated with keratin. Keratin Treatment creates a coating around the hair. Also, the acids used in these treatments re-align the hair bonds to a certain extent. Hence, these affect the hairstylist’s judgement during the perm procedure, as it gives the illusion of insufficient processing.
Image Credit: iStock. The chemicals in in-salon keratin treatments are also harmful. Keratin treatments done in salons contain ingredients like methylene glycol, formalin, methanal, and
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is keratin treatment damaging to hair