Zinc oxide is a white, powdery mineral with a long history of using it as a sun protectant. when used in sunscreen products, zinc oxide act as a physical block to the sun's ultraviolet radiation, may help to reduce or prevent sunburn and premature aging of the skin. zinc oxide is the broadest spectrum UVA and UVB reflector approved for used as a sunscreen by the FDA and is allowed in concentration up to 25%. zinc oxide powder with eugenol is often used for multiple purpose even in dentistry. zinc oxide with calamine powder is often use together to produce better effect. zinc oxide is also used in a wide range of cosmetic and personal care products including makeup, baby lotions, bath soaps, and foot powders. It is use as bulking agent, colorant, skin protectant in over the counter drug products and as a sunscreen, zinc oxide may treat a variety of skin conditions in products with concentration up to 40% in baby diaper rash ointments.