Sphingomyelin in skin cosmetics, 56 Split ends mending of, 451 Squalene peroxidation, 268 Stability of clay facial masks, 45 Stratun corneum enzymes, 540 keratin structure in, 17 5 as moisture barrier, 594, 599 NMF, 586 ozone effects, 174 Stress effects on skin, 62 Sun exposure and sebum peroxidation, 268 Sunless tanning formulation, 541 Sun protection factor and melanin, 596 Sunscreens analysis of, 59 film-forming polymers in, 568 nanoparticles in, 174 regulations, 177 photostability of, 203 stability of, 179 water-resistant, 663 Surfactants cream stability, 552 hair dyes, 555 microemulsions, 554 surfactant-humectant systems, 599 Sweat glands overview, 539 Tanning products formulation, 541 Taurine and hair growth, 61 Testing adipocytes, 199 antiperspirants, 186, 188 evaluation of, 66 hair claims, 85 in home use test, 668 SUBJECT INDEX irritation, 519 ocular irritancy, 543 odorants, 201 skin hydration, 176 sunscreens, 203 wrinkles, 206 Theobroma cacoa extract anti-cellulite properties of, 267 Thickeners polymers, 178 Thioredoxin free radical effects of, 548 Titanium dioxide nanoparticles in, 17 4 Tomato extract anti-cellulite properties of, 267 Tranexamic acid analysis, 215 Transmission electron microscopy of medulla, 359 3,3,5-Trimethylcyclohexanols properties, 176 UV damage evaluation, 535 by 4-hydroxycinnamic acid, 560 Vernix caseosa cosmetic properties of, 173, 651 Vitamin A stability of, 667 Vitreoscilla filiformis extract evaluation, 62 Water mineral water vs tap water, 544 Wild yam extract anti-cellulite properties of, 267 Wool peptides hand care, 99 Wrinkle products adenosine, 176 formulation of, 14 7 peptides, 157 Wrinkles overview, 175, 537 X-ray diffraction of hair cuticle, 11 Ylang ylang oil skin penetration by, 245 685