1. cosmetic
After they are applied to the skin in a cosmetic, water evaporates and the proteins contract and curl up, causing the skin underneath to contract and viola, fine lines and wrinkles are reduced-. ... The tretinoin in Renova, which has been formulated to reduce skin dryness, has been shown to actually reduce some of the sun-induced skin damage, fine lines and wrinkles. ... In time, these symptoms can subside but for many they are too concentrated to endure. ... Some recent studies in fact show that high concentrations of vitamin C can stimulate collagen synthesis when applied topically and can...
- Word Count: 1976
- Approx Pages: 8
- Grade Level: Undergraduate