The Garnier Bright Complete Vitamin C skincare regimen is a 4-step system that promises to brighten and even out your skin tone. Garnier Bright Complete Vitamin C Serum - This potent serum is formulated to visibly reduce dark spots and even skin tone. Garnier Bright Complete Vitamin C Tissue Mask - This sheet mask is designed to deliver a boost of hydration and radiance to the skin. While there is limited scientific evidence to support all of the claims made about this particular line of products, Vitamin C is a well-researched ingredient that can offer some benefits for the skin. Vitamin C is an antioxidant that can help protect the skin from damage caused by free radicals. It can also help to stimulate the production of collagen, which is essential for maintaining skin firmness and elasticity.