Titanium Dioxide (E171)
Last reviewed October 18, 2026 · Evidence strength: Limited · How we grade evidence
In plain words: Titanium dioxide is a white coloring used to make candy shells, frosting and coatings look bright. Europe banned it in food in 2022 because experts couldn't rule out damage to DNA, based mostly on animal and lab studies. There's no direct proof of harm in people, but it adds only color, so skipping it costs nothing.
Also listed on labels as: Titanium dioxide, TiO2, E171, CI 77891, color added, artificial color
What is it, and why is it in food?
Titanium dioxide is a white mineral powder. In food it makes colors look brighter and more opaque, as in the white of candy-coated chocolates, chewing gum, frosting, marshmallows and some coffee creamers. It's also in many supplements and pill coatings.
What does the science say?
| The popular claim | "Banned in the EU for immunotoxic and genotoxic concerns; avoid." (Dr. Eric Berg) |
| Our verdict on that claim | Supported |
| Evidence strength | Limited: animal and lab studies raised concerns that experts could not rule out; no human studies. |
| Kinds of studies | Animal studies, lab studies, European safety review |
- Rat studies: Food-grade titanium dioxide given to rats disrupted immune balance in the gut and started early pre-cancer changes in the colon.1
- Europe's 2021 review: EFSA said a concern about DNA damage (genotoxicity) "could not be ruled out," and concluded titanium dioxide "can no longer be considered as safe when used as a food additive."2
- People: There are no studies of health outcomes in people who eat it. That's a gap, not a clean bill of health.
- A claim that goes too far: Some posts link food titanium dioxide to breast cancer. We found no evidence for that.
What do regulators say?
- European Union: banned as a food additive since 2022.2
- US: FDA still allows it, up to 1% of a food's weight, and is reviewing a 2023 petition to remove it.3
Who should be careful?
- Kids who eat a lot of candy, gum and frosting get the most. Since it adds only looks, it's an easy thing to cut.
How common is it in US foods?
In our check of USDA's Branded Foods database, 12,861 of 439,966 US packaged foods with an ingredient list name titanium dioxide (about 2.9%, or roughly 1 in 34).4 It shows up most often in: candy (4,356); cakes, cupcakes, snack cakes (1,640); cookies & biscuits (1,128); popcorn, peanuts, seeds & related snacks (1,033); baking decorations & dessert toppings (872). The label may also just say "color added" or "artificial color," so some products are missed. These are label records companies sent to USDA, mostly in 2021 to 2023, so some products have changed since. Counts come from a text match of ingredient lists and are approximate.
Swaps and tips for families
- Choose candy-coated chocolates and gum from brands that dropped it. Versions made for the European market can't use it.
- For white frosting, plain butter-and-sugar frosting is naturally off-white and tastes the same.
- Supplements and vitamins: ask for brands without titanium dioxide in the coating.
Beyond the plate: related non-food exposures
Breathing in titanium dioxide dust is classed as "possibly carcinogenic" (IARC Group 2B), which matters for factory workers and loose powders, not food.5 Titanium dioxide is also common in toothpaste, sunscreen, cosmetics, supplements and pill coatings. Mineral sunscreen with titanium dioxide is still a good choice for sun protection.
Frequently asked questions
Why did Europe ban titanium dioxide?
In 2021, the EU's food safety agency said it couldn't rule out that titanium dioxide damages DNA, based mainly on animal and lab studies, so it could no longer call it safe. The ban took effect in 2022.
Is titanium dioxide banned in the US?
No. As of October 2026 FDA still allows it in food up to 1%, and it is reviewing a petition to remove it.
Is titanium dioxide in sunscreen a problem?
The food concern is about swallowing it. Sunscreen with titanium dioxide is still a good, widely recommended way to protect skin. Avoid breathing in loose powders.
How do I avoid titanium dioxide?
Check labels on candy, gum, frosting, coffee creamer and supplements. It's listed as titanium dioxide, TiO2 or, in Europe, E171.
Related guides
Sources
Every source below was checked against PubMed, the publisher or the official page by our research team in October 2026.
- Food-grade TiO(2) impairs intestinal and systemic immune homeostasis, initiates preneoplastic lesions and promotes aberrant crypt development in the rat colon. Scientific reports, 2017. PubMed 28106049 · doi:10.1038/srep40373
- Safety assessment of titanium dioxide (E171) as a food additive. EFSA J, 2021. PubMed 33976718 · doi:10.2903/j.efsa.2021.6585
- FDA: Titanium Dioxide as a Color Additive in Foods. Link
- FoodData Central, Branded Foods dataset (release 2026-04-30). U.S. Department of Agriculture, Agricultural Research Service, 2026. Link
- Carcinogenicity of carbon black, titanium dioxide, and talc. Lancet Oncology, 2006. PubMed 16598890 · doi:10.1016/s1470-2045(06)70651-9
This guide is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. If you think you or your child reacted to a food, talk to a health professional. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 18, 2026. Spotted an error? Email [email protected].