Edited by a team of experienced and internationally renowned contributors, the updated Third Edition is the standard reference for cosmetic chemists and dermatologists seeking the latest innovations and technology for the formulation, design, testing, use, and production of cosmetic products for skin, hair, and nails.New features in the Third Edition: ULLI39 new chapters reorganized by skin functions/LILIdescriptions of ingredients, products, efficacy measurement, and mechanisms in each chapter/LILIrevised chapters on skin types, skin perception, and targeted products/LILInew chapters on skin aging and cosmetics for the elderly/LILIstrong emphasis on testing and current methods used for testing, and the evolution of instruments for skin and hair testing/LILInew ingredients, delivery systems, and testing methodologies/LILIinformation on skin physiology and cosmetic product design/LILIinteractions affecting and attributed to cosmetic products/LILIcosmetic ingredients, vehicles, and finished products/LILIdifference between pure cosmetics for enhancement and cosmetics used to treat/LILIhigh quality standards in cosmetic products that improve appearance, protect their targets, and maintain natural functions/LI/UL