40 citations
,
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.
4 citations
,
January 2022 in “Cosmetics” Avoid high-tension styles and use professional treatments to reduce hair damage and health risks.
4 citations
,
December 2018 in “Macedonian Journal of Chemistry and Chemical Engineering” A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.
2 citations
,
March 2019 in “Applied clinical research, clinical trials and regulatory affairs” Different countries have regulations to ensure the safety of hair care products, with some recalling hair straighteners due to high formaldehyde.