| 摘要 |
<p>The invention relates to the utilization of xanthines, optionally incorporated in liposomes in order to favour the pigmentation of skin or hair. The xanthine has formula (I), or a salt thereof, or a vegetal extract containing it, wherein: particularly R1 and R4 represent each a hydrogen atom and R1 and R2, similar or different, represent each a hydrogen atom or an alkyl radical having preferably from 1 to 4 carbon atoms. This xanthine, optionally incorporated in liposomes, is used for the preparation of a cosmetic or pharmaceutical, particularly dermatological composition for the pigmentation of hair or skin or to reinforce the natural defences of skin against solar radiation.</p> |
