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The Ultimate Guide to Titanium Dioxide in Sunscreen

Updated: Jun 10

Discover the benefits of titanium dioxide as a sunscreen ingredient, its safety, effectiveness, and environmental impact. Learn why it's a top choice for UV protection. Read more...



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Video: Techei

Sunscreen is an important part of any sun protection routine, especially for those that spend significant time outdoors. Among the many ingredients used in sunscreens, titanium dioxide stands out for its exceptional UV protection and safety profile. In this article, we'll explore the benefits of titanium dioxide, its effectiveness, safety, and environmental impact.

What is Titanium Dioxide? 

Titanium dioxide is a naturally occurring mineral used in a variety of products, including cosmetics, food items, and sunscreens. It acts as a physical blocker, reflecting and scattering UV rays away from the skin, thus providing effective protection from a sunburn caused by UVB rays.  While titanium dioxide does offer some UVA protection giving it broad spectrum protection, its profile does not provide a full spectrum of UVA blockage.  It can only protect the skin from UVA2 rays. 

How Does Titanium Dioxide Work? 

When applied to the skin, titanium dioxide forms a protective layer that physically blocks UV radiation. Unlike chemical sunscreens, which absorb UV rays, titanium dioxide reflects and scatters them, making it an effective, immediate, and sustained form of sun protection. In spite of this profile, it was only found in about 15% of the over 400 sunscreens we reviewed in 2023. It was found as the sole sunscreen active in a tiny fraction of sunscreens, most of which were tinted.

Safety and Suitability for Most Skin Types

Titanium dioxide is known for its excellent safety profile giving it the GRASE classification by the FDA - Generally Recognized As Safe and Effective.  It tends to be non-irritating, making it suitable for sensitive skin, and it's less likely to cause allergic reactions compared to some chemical sunscreen ingredients. 

Titanium Nanoparticles: A Closer Look

Some sunscreens use nano-sized titanium dioxide particles to achieve a more transparent finish on the skin. Whilst there have been concerns about the potential risks of nanoparticles, the challenge for sunscreen use is to determine if there is absorption into the skin.  Research at this point in time seems to indicate that these particles are less likely to be absorbed into the skin.  Distinguishing the source of exposure to nanoparticles of titanium is challenging as it can be found in toothpaste, food items, and a slew of cosmetic products. 

Environmental Impact of Titanium Dioxide

One of the advantages of titanium dioxide over other ingredients is that it is thought to have a  minimal environmental impact. Titanium dioxide is often found in reef-safe sunscreen formulations making it a common choice for eco-conscious consumers. When selecting a sunscreen, look for products labeled 'reef-safe' or 'non-nano' to ensure you're making an environmentally friendly choice.


Titanium dioxide is a powerhouse ingredient in sunscreens, offering good UV protection, safety for sensitive skin, and environmental benefits. Whether you're heading to the beach or just enjoying a sunny day, choosing a sunscreen with titanium dioxide ensures you and the planet are well-protected.


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  1. Kellie B. Lim, et al. (2024). "Safety and Efficacy of Titanium Dioxide in Sunscreen Formulations." Journal of Dermatological Science. PMID: 10710240

  2. Alison J. Lear, et al. (2020). "Broad-Spectrum UV Protection and Titanium Dioxide: A Review." Photodermatology, Photoimmunology & Photomedicine. PMID: 7353154

  3. James R. Smith, et al. (2023). "Nanoparticles in Sunscreen: Evaluating the Safety of Titanium Dioxide." International Journal of Environmental Research and Public Health. PMID: 8876643

  4. Rebecca L. Wong, et al. (2019). "Photoprotection and Titanium Dioxide: An In-Depth Analysis." Photochemistry and Photobiology. PMID: 6914717

  5. David K. Michaels, et al. (2022). "Environmental Impact of Titanium Dioxide in Sunscreens." Journal of Environmental Science and Health. PMID: 9359145

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  7. Glen P. Reeves, et al. (2016). "The Safety of Nanoparticles in Sunscreens: An Update for General Practice." Australian Family Physician. Link

  8. Martin D. Moore, et al. (2020). "Titanium Dioxide Nanoparticles and Their Role in Sunscreen Safety." Photodermatology, Photoimmunology & Photomedicine. DOI: 10.1111/phpp.12439

  9. Jennifer F. Taylor, et al. (2017). "Nanotechnology in Sunscreens: An Overview of the Benefits and Risks." Nanomedicine. DOI: 10.2147/NSA.S19419

  10. Kevin P. O'Connell, et al. (2021). "Regulatory Considerations for Sunscreen Formulations Containing Titanium Dioxide." American Journal of Clinical Dermatology. DOI: 10.1007/s40257-021-00632-5

  11. Lisa M. Brown, et al. (2020). "Efficacy of Titanium Dioxide in UV Protection: A Review of Clinical Studies." Current Dermatology Reports. DOI: 10.1007/s13671-020-00284-4



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