The body uses Vitamin C to replace the damaged tissue, helping to heal wounds at a faster pace. Wounds that heal slowly indicate Vitamin C deficiency. Collagen also provides the structure for the blood vessels. The tiny blood vessels under the skin carry oxygen and nutrients that keep the skin healthy. Without enough nutrients, the skin will become rough and dry. Creams containing Vitamin C improve the appearance and texture of the skin. Vitamin C increases the formation of elastin which thickens, protects, and heals the skin cells. The thickening effect helps retain moisture, increases the skin circulation, and plumps up the skins surface.