Niacinamide (vitamin B3) is used in skincare products to reduce the appearance of hyperpigmentation, redness, yellowing and blotchy spots on the face, as well as treatment of wrinkles. Skin has two important enzymes (NADH and NADPH) that decline as we grow older. When applied directly to the skin, vitamin B3 seems to stem that rate of decline. It also protects the skin’s barrier from irritants and can help the skin remain hydrated, increasing elasticity. Inflammatory skin conditions like acne and rosacea can benefit from products containing this natural ingredient. It may also be a useful addition to an anti aging skin care regimen.