Use of one or more substances selected from the group of pyrimidines and purines for the preparation of cosmetic or dermatological preparations for boosting natural skin tanning and/or for stimulating melanogenesis in human skin.
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a continuation of International Application No. PCT/EP02/11157, filed Oct. 4, 2002, the entire disclosure whereof is expressly incorporated by reference herein, which claims priority under 35 U.S.C. .sctn. 119 of German Patent Application No. 101 50 412.8, filed Oct. 11, 2001.
