Updating and expanding the scope of topics covered in the previous edition, Percutaneous Absorption: Drugs, Cosmetics, Mechanisms, Methods, Fifth Edition supplies new chapters on topics currently impacting the field including cutaneous metabolism, skin contamination, exposure to protein allergens, in vitro absorption methodology and the percutaneous absorption of chemical mixtures. Complete with studies on the role of the skin as a key portal of entry for chemicals into the body, this book serves as a detailed reference source for recent advances in the field, as well as an experimental guide for laboratory personnel.Key Features: Details in vivo and in vitro methods for measuring absorption, dermal decontamination, mechanisms of transdermal delivery, and the relationship of transepidermal water loss to percutaneous absorption Considers a range of mathematical models, the safety evaluation of cosmetic ingredients, the absorption of hair dyes, nanoparticles for drug delivery, and other novel methods of drug delivery Discusses topics including skin metabolism, the skin reservoir, and the effects of desquamation on absorption