Improves the body's resistance to infection by maintaining the health of the skin so that harmful bacteria and viruses can't enter the body. Vitamin A stimulates new collagen production. The aging process causes skin cells to become slightly misshapen and altered in appearance. The use of vitamin A stimulates new skin cells that closely resemble younger, healthier skin cells. As an antioxidant, vitamin A neutralizes harmful elements in the skin to prevent wrinkles, resist infection, and accelerate healing. Vitamin A reduces sebum production and strengthens skin’s protective tissues to prevent acne. The increased cell turnover and resulting exfoliation caused by vitamin A fades acne scars.