Brazilian Keratin Hair Treatment: A Review

    June 2013 in “ Journal of cosmetic dermatology ”
    Courtney Weathersby, Amy Mcmichael
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    TLDR Brazilian keratin treatments can straighten hair but may contain harmful formaldehyde.
    Brazilian keratin treatments were popular for straightening hair and claimed to make curly hair more manageable, frizz-free, and shiny. Despite their widespread use and the lack of reported adverse side effects, many of these products contained formaldehyde or its derivatives, raising safety concerns.
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