Zink Oxide (Non-Nano, Ongecoat)What exactly is zinc oxide? Zinc oxide is a natural product (oxidized zinc) that is widely used in sunscreens or Day creams with a protection factor, because it naturally protects against the sun. However, most manufacturers use zinc oxide that has been refined so strongly (into nano particles) that it can enter the blood through the skin, which is not desirable. Also, the zinc particles are often coated with a layer of silicone, which in turn can be