ABSTRACT
The immense abundance of cosmetic products against skin aging demands a critical evaluation of the promised effects. Cosmeceuticals whose quality is established should possess an adequate scientically documented proof of in vivo and in vitro efcacy and scientically founded wanted and unwanted effects. Cosmetic products whose efcacy and tolerability have been demonstrated in scientic in vivo and in vitro studies are much in demand, and the cosmetic and pharmaceutical industry responds to this trend with a multitude of modern skin care products. Due to the continual development of new skin care products with new active ingredients, minimum requirements for quality and scientic documentation are a primary goal [5].
