About Photo-damage Of Human Hair

Abstract

This paper reviews the current knowledge about human hair photodamage and the photodegradation mechanisms proposed in the literature. It is shown that there are still a number of questions without answer regarding this issue. For example, a better understanding of the hair structural changes caused by different radiation wavelengths is still lacking. We also find controversies about the effects of sun exposure on different hair types. Explanations to these questions are frequently sustained on the amount and type of melanin of each hair, but factors such as the absence of knowledge of melanin structure and of established methodologies to use in human hair studies make it difficult to reach a general agreement on these issues. © The Royal Society of Chemistry and Owner Societies 2006.52165169Hoting, E., Zimmermann, M., Hocker, H., Photochemical alterations on human hair. Part II. Analysis of melanin (1995) J. Soc. Cosmet. 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