Table of Contents

Regulatory aspects.
Ethical aspects of cosmetic testing.
Good clinical practice.
Guidelines in dermocosmetic testing.
Claim support: how to create and substantiate claims.
Testing laboratory.
Research staff.
Testing population.
Testing devices and methods.
Factors influencing measurements.
Study design.
Cosmetic testing report.
Moisturizers and emollients.
Antiaging and antiwrinkle products.
Products for impure, acne-laced skin.
Assessment of hair morphology.
Skin color and pigmentation.
Characterization of sunscreens: determination of the SPF.
Practical aspects of shampoo and conditioner testing.
Antiperspirants and deodorants.
Hair growth.
Sensory perception.
Practical use and significance of transepidermal water loss measurements.
Compliance check with on-site measurements: advanced ways in product testing. Skin physiology assessment is moving rapidly from a descriptive approach to a deeper understanding of biophysical and biochemical processes in the stratum corneum, e.g. on stratum corneum barrier function as well on stratum corneum hydration. The research with bioengineering methods offers now reliable and reproducible approaches for product testing in the pharmaceutical and cosmetic industry as well as in basic research. This cookbook is intended to give basic information regarding skin physiology, the assessment of skin functions in controlled studies using non-invasive biophysical instrumen.