Quick summary
At a glance
Titanium dioxide is a white pigment used to brighten or whiten foods, supplements, medications, cosmetics, and other products. It provides no nutritional benefit and is used mainly for appearance. While regulators disagree on its safety, the European Union no longer permits it as a food additive because it could not rule out a potential genotoxicity concern.
Because it is non-essential and uncertainty remains, we generally choose products without titanium dioxide when alternatives are available.
What it is
Titanium dioxide (TiO₂) is a naturally occurring mineral that is refined into a bright white pigment. It has been used for decades in foods, dietary supplements, medications, toothpaste, cosmetics, and many household products to improve color and opacity.
In foods, titanium dioxide is known as E171 in many countries.
Why it is used
Titanium dioxide is added to products to:
Make foods look brighter or whiter
Improve opacity so products appear less transparent
Create a more uniform appearance
Enhance visual appeal
It is not added for nutrition, preservation, or flavor.
Its purpose is almost entirely cosmetic.
Where it is commonly found
Titanium dioxide may be found in:
Candy
Chewing gum
Frostings
Cake decorations
Coffee creamers
Some baked goods
Certain dietary supplements
Some prescription and over-the-counter medications
Toothpaste
Cosmetics
Sunscreen (different exposure route than food)
Availability varies by country since the European Union banned its use in foods.
What current research says
Titanium dioxide has become one of the most debated food additives in recent years.
In 2021, the European Food Safety Authority (EFSA) reviewed hundreds of studies and concluded that it could not rule out the possibility that titanium dioxide particles may damage DNA (genotoxicity). Because this uncertainty could not be resolved, EFSA determined that titanium dioxide could no longer be considered safe as a food additive. The European Union subsequently prohibited its use in foods.
Other regulatory agencies have reached different conclusions.
The U.S. Food and Drug Administration (FDA) continues to allow titanium dioxide in foods within established limits, stating that current evidence does not demonstrate a safety concern under approved conditions of use.
Similarly, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) concluded that available evidence does not provide convincing proof that food-grade titanium dioxide is genotoxic, while acknowledging that additional research is still needed.
Overall, the current scientific evidence does not prove that normal dietary exposure causes disease in humans, but it also has not completely resolved questions surrounding long-term exposure and very small particles.
Potential concerns or controversies
Researchers continue to study whether certain titanium dioxide particles could:
Damage DNA (genotoxicity)
Increase oxidative stress within cells
Trigger inflammation
Accumulate in certain tissues after repeated exposure
Most concerns come from laboratory and animal studies, while long-term human data remain limited.
This ongoing uncertainty explains why regulatory agencies have reached different conclusions.
Practical takeaway
Our Approach:
Titanium dioxide is an ingredient we generally choose to avoid.
Not because it has been proven harmful in humans, but because:
it serves no nutritional purpose,
it is added primarily for appearance,
and respected scientific organizations disagree about its safety.
When two similar products are available, we typically recommend choosing the one without titanium dioxide.
For most people, avoiding titanium dioxide is a simple way to reduce exposure to an unnecessary additive without significantly changing their diet.
Alternative or common names
- Titanium Dioxide
- TiO₂
- E171
- INS 171
Related Better Products
Relevant Better Products guides will appear here when they are connected to this ingredient.
Sources and references
- European Food Safety Authority (EFSA) · 2021
EFSA concluded that a concern for genotoxicity could not be ruled out and determined that titanium dioxide could no longer be considered safe as a food additive.
- U.S. Food & Drug Administration (FDA) · Current Guidance
Explains how titanium dioxide is regulated in the United States, including the current 1% by-weight limit in foods and the FDA's position on available safety evidence.
- Joint FAO/WHO Expert Committee on Food Additives (JECFA) · 2023
JECFA concluded that available evidence did not provide convincing evidence that food-grade titanium dioxide is genotoxic, while acknowledging that additional research is still needed.
- Health Canada · 2022
Health Canada's comprehensive review of the available scientific evidence regarding the safety of food-grade titanium dioxide.
- European Commission · 2022
Official European Union regulation removing titanium dioxide (E171) from the list of approved food additives for use in foods.