23 citations,
June 2014 in “International Journal of Cosmetic Science” Glyoxylic acid is a safer alternative to formaldehyde for hair straightening and effectively changes hair structure.
15 citations,
July 2002 in “Australasian Journal of Dermatology” Two plywood factory workers developed contact dermatitis from phenol-formaldehyde resin, a known allergen.
40 citations,
June 2013 in “Journal of cosmetic dermatology” Brazilian keratin treatments can straighten hair but may contain harmful formaldehyde.
[object Object] 13 citations,
March 2017 in “Skin Research and Technology” Formaldehyde damages curly hair more than glyoxylic acid.
2 citations,
May 2022 in “International Journal of Trichology” Brazilian Keratin Treatment can cause skin reactions like redness and scaling, possibly due to formaldehyde.