23 citations
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January 2016 in “Forensic Science International” Thermal hair straightening changes drug levels in hair, affecting test results.
Thermal straightening can damage ethnic hair and may pose health risks.
December 2025 in “Biopolymers” Heat worsens damage in chemically treated hair, especially bleached and straightened hair.
March 2010 in “Cosmetic Dermatology” Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.
25 citations
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May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.