Keratin hair treatments are now formaldehyde-free, but is glyoxylic acid any better?

Her CampusBy Lynn RobchinskyOct 21, 2026
Keratin hair treatments are now formaldehyde-free, but is glyoxylic acid any better?

Two girls have been hospitalized for kidney-related injuries following hair straightening treatments that contained glyoxylic acid. While it is marketed as a safer alternative to the keratin hair treatment containing formaldehyde, how much better is it, really?

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