How to Combine Collagen and Glutathione for Radiant Skin Clinikally 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 L Glutathione Reduced With Vitamin C Tablets Zeroharm Liposomal Glutathione & Vitamin C Intelligent Labs Glutathione vs Vitamin C: Which is Best for Your Health?