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: Myths vs. Facts **Myth:** Glutathione supplements work instantly. **Fact:** Glutathione levels need time to build up in the body, and the benefits may take weeks to become 10 Cooperation of glutathione with vitamins C and E. R initiator of a Download Scientific Diagram Nature's Key Glutathione, Vitamin E and Vitamin C supplements. A combination of three powerful antioxidants ingredients that neutralize free radicals, support skin health and provide immune support.