An Overview of Chemical Straightening of Human Hair: Technical Aspects, Potential Risks to Hair Fiber and Health, and Legal Issues

October 2013 in “ International Journal of Cosmetic Science ”

Ana Luisa Miranda‐Vilela, A. J. Botelho, Luís Alexandre Muehlmann

chemical hair straightening hair breakage scalp disorders carcinogenic effects formaldehyde hair morphology hair structure safer alternatives regulatory measures hair straightening hair damage scalp issues cancer risks formalin hair types hair texture safe products regulations

TLDR Chemical hair straightening can damage hair and health, needing safer alternatives and stricter regulations.

The document reviewed the technical aspects, potential risks, and legal issues of chemical hair straightening. It explained that chemical straightening products, while effective in altering hair appearance, posed risks such as hair breakage, scalp disorders, and potential carcinogenic effects, particularly with chemicals like formaldehyde. The review emphasized the importance of understanding hair morphology and the differences in hair structure among ethnic groups for effective treatment. It also highlighted the need for safer alternatives and stringent regulatory measures to minimize health risks. The study was supported by the Brazilian National Council for Technological and Scientific Development and the company 'Beleza Natural'.

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