40 citations
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June 2013 in “Journal of cosmetic dermatology” Brazilian keratin treatments can straighten hair but may contain harmful formaldehyde.
January 2023 Hair keratin treatments can be harmful, potentially causing health issues like skin reactions and cancer.
2 citations
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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.
December 2008 in “The American Journal of Cosmetic Surgery” Multi-pass laser skin treatments improved healing, reduced pain, and had no major complications.
32 citations
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December 2011 in “Reproductive Sciences” Brazilian women with PCOS and both menstrual irregularity and high male hormone levels have a higher chance of having metabolic syndrome.