chapter 1 An Introduction to the Book -- chapter 2 Structure and Function of the Skin Barrier: An Introduction -- chapter 3 Lipid Phase Behavior: A Basis for an Understanding of Membrane Structure and Function / chapter 4 Stratum Corneum Lipid Structure: Insights from NMR and FTIR Spectroscopic Studies / chapter 5 “Confidence Intervals” for the “True” Lipid Composition of the Human Skin Barrier? / chapter 6 Stratum Corneum Lipid Organization In Vitro and In Vivo as Assessed by Diffraction Methods / chapter 7 The Mammalian Skin Barrier: Structure, Function, and Formation Considerations / chapter 8 The Skin Barrier: An Evolutionary and Environmental Perspective / chapter 9 Skin Barrier Function in Diseased Skin and in Normal Skin Exposed to Delipidizing Compounds: A Skin Penetration Perspective / chapter 10 Understanding the Irritative Reaction / chapter 11 Formation and Structure: An Introduction to Hair / chapter 12 The Hair Fiber Surface / chapter 13 Biology of Hair Pigmentation / chapter 14 Androgen Influence on Hair Growth / chapter 15 Alopecia Areata: An Update on Etiology and Pathogenesis / chapter 16 The Structure and Properties of Nails and Periungual Tissues