Publication date: Available online 18 August 2017
Source:Annales de Dermatologie et de Vénéréologie
Author(s): M.-C. Martini
Les autobronzants actuellement sur le marché sont pratiquement tous à base de dihydroxyacétone (DHA) associée ou non à l'érythrulose, à des dérivés de tyrosine, parfois à une naphtoquinone. La coloration obtenue, voisine du bronzage naturel, est due à la combinaison chimique de la DHA avec les acides aminés de la peau selon la réaction de Maillard. Il y a formation de mélanoïdines, pigments polymériques, fixés dans le stratum corneum qui y demeurent jusqu'à desquamation des cornéocytes. Cette coloration est donc semi-permanente, bien tolérée par la peau. La formulation des produits est délicate et leur conservation difficile mais aucune autre substance ne fournit de résultats plus satisfaisants et plus durables.Practically all currently available self-tanning products have as their active ingredient dihydroxyacetone (DHA), which may or may not be combined with erythrulose, tyrosine derivatives, and occasionally a naphthoquinone. The resulting skin tone, which resembles a natural tan, is due to chemical combination of the DHA with amino acids in the skin through the Maillard reaction. Polymer pigments known as melanoidins are formed and are fixed in the stratum corneum, where they remain until corneocyte desquamation occurs. The colouring thus achieved is semi-permanent and is well tolerated by skin. While the formulation of such products is complex and their storage difficult, no other substances provide more satisfactory or more lasting results.
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