Glutathione: Benefits and Supplements Glutathione and Vitamin C: Better Together? Performance Lab 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 hk vitals Glutathione Veg Capsules Achieve a radiant glow and support strong immunity with Watsons Glutathione, Vitamin C and Vitamin E! These three powerful antioxidants help boost collagen production and protect your skin from free radicals.