china paper industrial use excellent dispersion titanium dioxide anatase

Titanium dioxide, on the other hand, is a white pigment that is commonly used in cosmetics and personal care products due to its excellent covering power and UV protection properties. In shampoo, titanium dioxide helps to neutralize yellow tones in hair, giving it a brighter and more youthful appearance. It also has antibacterial properties, which can help to reduce the risk of scalp infections and promote healthier hair growth.

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The main concern with nanoparticles is that they are so tiny that they are absorbed into the skin more than we want them (ideally sunscreen should remain on the surface of the skin). Once absorbed they might form unwanted complexes with proteins and they might promote the formation of evil free radicals. But do not panic, these are concerns under investigation. A 2009 review article about the safety of nanoparticles summarizes this, to date, in-vivo and in-vitro studies have not demonstrated percutaneous penetration of nanosized particles in titanium dioxide and zinc oxide sunscreens. The English translation is, so far it looks like sunscreens with nanoparticles do stay on the surface of the skin where they should be.  

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