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Titanium Dioxide

Titanium Dioxide

What-it-does: sunscreen, colorant


Titanium Dioxide is one of the two members of the elite sunscreen group called physical sunscreens (or inorganic sunscreens if you’re a science geek and want to be precise).

Traditionally, UV-filters are categorized as either chemical or physical. The big difference is supposed to be that chemical agents absorb UV-light while physical agents reflect it like a bunch of mini umbrellas on top of the skin. While this categorization is easy and logical it turns out it's not true. A recent, 2016 study shows that inorganic sunscreens work mostly by absorption, just like chemical filters, and only a little bit by reflection (they do reflect the light in the visible spectrum, but mostly absorb in the UV spectrum).

Anyway, it doesn't matter if it reflects or absorbs, Titanium Dioxide is a pretty awesome sunscreen agent for two main reasons: it gives a nice broad spectrum coverage and it's highly stable. Its protection is very good between 290 - 350 nm (UVB and UVA II range), and less good at 350-400 nm (UVA I) range. Regular sized Titanium Dioxide also has a great safety profile, it's non-irritating and is pretty much free from any health concerns (like estrogenic effect worries with some chemical filters).

The disadvantage of Titanium Dioxide is that it's not cosmetically elegant, meaning it's a white, "unspreadable" mess. Sunscreens containing Titanium Dioxide are often hard to spread on the skin and they leave a disturbing whitish tint. The cosmetic industry is, of course, really trying to solve this problem and the best solution so far is using nanoparticles. The itsy-bitsy Nano-sized particles improve both spreadability and reduce the whitish tint a lot, but unfortunately, it also introduces new health concerns. 

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.  

All in all, Titanium Dioxide is a famous sunscreen agent and for good reason, it gives broad spectrum UV protection (best at UVB and UVA II), it's highly stable, and it has a good safety profile. It's definitely one of the best UV-filter agents we have today, especially in the US where new-generation Tinosorb filters are not (yet) approved. 

Show me some proof

  • Newman, Marissa D., Mira Stotland, and Jeffrey I. Ellis. "The safety of nanosized particles in titanium dioxide–and zinc oxide–based sunscreens." Journal of the American Academy of Dermatology 61.4 (2009): 685-692.
  • Monteiro-Riviere, N. A., et al. "Safety evaluation of sunscreen formulations containing titanium dioxide and zinc oxide nanoparticles in UVB sunburned skin: an in vitro and in vivo study." Toxicological Sciences (2011): kfr148.
  • Cole, Curtis, Thomas Shyr, and Hao Ou‐Yang. "Metal oxide sunscreens protect skin by absorption, not by reflection or scattering." Photodermatology, photoimmunology & photomedicine 32.1 (2016): 5-10.
  • Smijs, Threes G., and Stanislav Pavel. "Titanium dioxide and zinc oxide nanoparticles in sunscreens: focus on their safety and effectiveness." Nanotechnol Sci Appl 4.1 (2011): 95-112.

Products with a known amount of Titanium Dioxide

Other products with Titanium Dioxide

100% Pure Fruit Pigmented Healthy Foundation 3CE Cover Pot Concealer - Greenish A'pieu Madecassoside Stick Foundation Spf 30 Pa++ Alastin Hydratint Pro Mineral Broad Spectrum Sunscreen SPF 36 Alastin Hydratint Pro Mineral Broad Spectrum Sunscreen Spf 36 Alba Botanica Sport Mineral Sunscreen Fragrance Free Lotion Spf 45 Alba Botanica Sport Mineral Sunscreen Spf 45 Almay Truly Lasting Cover Foundation Alpha-H Total Eclipse Priming Mineral Sunscreen SPF40 Alumier Sheer Hydration Spf 40 Versatile Tint AlumierMD Clear Shield Broad Spectrum Spf 42 AlumierMD Moisture Matte Broad Spectrum Sunscreen Spf 40 AlumierMD Sheer Hydration Spf 40 Untinted Angel Face Mineral Cosmetics Angel Face Mineral Foundation April Skin Magic Snow Bb Cream Spf50+/Pa+++ Arbonne Re9 Advanced Prepwork Soft Focus Veil Broad Spectrum Spf 30 Arcona Reozone® 40 Spf 40 Atopalm Bb Cream Australian Gold Botanical 70 Australian Gold Botanical Mineral Sunscreen Lotion SPF30 Australian Gold Botanical Spf 50 Tinted Facial Lotion Australian Gold Botanical Sunscreen Tinted Face Mineral Lotion, Broad Spectrum, Water Resistant, Spf 50 Australian Gold Natural Botanical Mineral Spf 50 Sunscreen Lotion Aveda Daily Light Guard™ Defense Fluid Broad Spectrum SPF 30 Aveeno Positively Mineral Face Milk SPF 40+ Aveeno Protect + Soothe Face Mineral Sunscreen SPF 30 Aveeno Ultra-Calming Daily Facial Moisturizer Spf 30 Aveeno Baby Continuous Protection Sunscreen Stick SPF 50 Avene Couvrance Creme De Teint Compacte Avene High Protection Tinted Compact Avene Light Mineral Lotion Spf 50+ (Face & Body) (Canada) Avene Mineral Light Mattifying Sunscreen Lotion Spf 50+ Avene Tinted Compact Cream SPF 50 Avene Tinted Mineral Sunscreen Fluid Spf 50 Avene Ultra-Light Mineral Lotion Spf 50+ (Face) Avene eau thermale avène lip balm spf 30 Avène - Complexion Correcting Shield SPF 50+ BABY BUM Sunscreen Spray SPF 50 BRUSH ON BLOCK Mineral Sunscreen Powder Broad-spectrum SPF 50 BRUSH ON BLOCK SPF 30 Translucent BRUSH ON BLOCK SPF 32 Protective Lip Oil BRUSH ON BLOCK Translucent Mineral Powder Sunscreen Babo Botanicals Daily Sheer Facial Sunscreen Spf 40 - Fragrance Free Babo Botanicals Daily Sheer Tinted Facial Mineral Sunscreen SPF 30 Babyganics Mineral Sunscreen Spray SPF 50+ Babyganics SPF 50+ Mineral Sunscreen Stick Bali Breeze Tropical Sunscreen Sport Spf 50+ Pa++++ Banana Boat Kids Mineral Foam Sunscreen SPF 50, Berry Blast Banana Boat Kids Mineral Sunscreen Lotion - Spf 50+ Banana Boat Sensitive 100% Mineral Sunscreen Lotion