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© 1996 Society of Cosmetic Chemists
Journal of the Society of Cosmetic Chemists, Vol. 47, No. 4, 201-211


Photochemical alterations in human hair. Part III: Investigations of internal lipids
Edo Hoting , Monika Zimmermann

ABSTRACT

Synopsis

Investigations of the internal lipids of human hair were performed after irradiation with simulated sunlight (global) or specific ranges of UV-B, UV-A, visible light, or IR. A mild extraction method and quantitative determination of internal lipids separated by thin-layer chromatography (TLC) allows the detection of significant differences between the photochemical response of black and blond hair. Using the example of cholesterol and free fatty acids, it could be demonstrated that the visible range of sunlight destroys the internal lipids to a considerably higher extent than exposure to UV-B and UV-A ranges. The photochemical destruction of lipids is largely retarded by the pigment eumelanin.

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© 1996 Society of Cosmetic Chemists
Journal of the Society of Cosmetic Chemists