With the new Cosmetics Directive of the European Union, manufacturers and distributors of cosmetics are required to keep a dossier of products containing information on product safety and efficacy. On a global scale, scientific proof of claims made for cosmetic products becomes more and more important. This book provides the information to choose the right methods for proving efficacy and/or safety of all types of cosmetics. Edited by leading experts in the field, this volume contains contributions by highly experienced researchers presenting in detail their strategies and methods for cosmetological claim support.