Vitamin C vs Glutathione whats the difference? Both brighten the look of skin but they work in different ways. Vitamin C helps visibly brighten and improve the appearance of sun damage while Glutathione vs Vitamin C: Which Is Better for Skin Glowing? PURCELL L Glutathione Vitamin Boosting Toner Vitamin E Linus Pauling Institute Oregon State University Effects of oral vitamin E and carotene supplementation on ultraviolet radiationinduced oxidative stress in human skin ScienceDirect