Practical Aspects of Cosmetic Testing : Springer : 9783642423239 : 364242323X : 13 Dec 2014 : Assessment of skin physiology is moving rapidly away from a purely descriptive approach as we gain a deeper understanding of biophysical and biochemical processes in the stratum corneum, such as those relating to its barrier function and hydration. As a result of research utilizing bioengineering methods, reliable and reproducible approaches are now available for product testing in the pharmaceutical and cosmetic industry as well as in basic research. This book examines in detail all aspects of cosmetic testing -- legal, general, and practical. After discussion of regulatory and ethical issues and guidelines, essential guidance is provided on the planning, performance, and evaluation of scientific studies in skin physiology. The topics addressed range from laboratory and staffing requirements through to testing devices and methods, factors influencing measurements, and study design. In additio