EltaMD UV Clear Broad-Spectrum SPF 46 sunscreen is formulated with 5% high-purity niacinamide (vitamin B3) to help reduce the appearance of blemishes, discoloration, and photo-damage. Niacinamide’s effect on blemishes such as acne, as well as skin discoloration, has been proven scientifically many times over. Niacinamide’s management of acne in several studies suggests it to be highly effective. In one study, as many as 82% of people with inflammatory acne showed improvement after using niacinamide as a topical treatment for eight weeks. Additionally, 60% had significant reductions in papules/pustules and 52% had a reduction in the severity of their acne. * EltaMD UV Clear contains 9% transparent micronized zinc oxide to protect skin against damaging UVA (aging) rays. It delivers SPF 46 to protect skin from UVB (burning rays). Ideal for daily use for various skin types, EltaMD UV Clear is extremely lightweight and contributes to maintaining smooth, clean, clear skin. It works well alone or under makeup.