January 2022 in “International journal of trichology” Glyoxylic acid straighteners cause more protein loss but have similar hair strength effects as traditional alkaline straighteners.
3 citations
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June 2019 in “Journal of cosmetic dermatology” Lower pH straighteners change hair more but weaken it.
2 citations
,
March 2022 in “Anais brasileiros de dermatologia/Anais Brasileiros de Dermatologia” Chemical hair straighteners can cause scalp and hair damage, but long-term effects are unclear.
4 citations
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January 2021 in “Skin appendage disorders” Hair straightening can damage hair and pose health risks, including exposure to carcinogens and hair loss.
18 citations
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July 2015 in “Journal of cosmetic dermatology” Straightening and coloring hair, especially with sodium hydroxide, greatly increases protein loss.