Titanium Dioxide is a naturally occurring mineral used as a coloring agent whitener thickening agent and sunscreen ingredient in cosmetics and personal care products. Its high refractive index makes it a popular ingredient in whitening formulas because it provides a bright reflection; it is also considered an effective opacifier. It is often found in mineral make up formulas as well as whitening and under eye creams. Titanium Dioxide is one of the gentlest UV filters out there. It also helps you create a wide variety of foundation shades and gives products their opaque white looks.