Skittles aren’t banned outright in other countries, but specific ingredients used in the candy have been. The European Union banned titanium dioxide as a food additive in 2022, and several of the synthetic dyes that give Skittles their rainbow colors require warning labels in Europe linking them to behavioral problems in children. These regulatory decisions forced Mars, the company that makes Skittles, to reformulate the product for international markets while continuing to sell the original version in the United States for years.
Titanium Dioxide: The Core Issue
Titanium dioxide, listed as E171 on European food labels, is a white pigment that was used in Skittles to give the candy shell its bright, opaque coating. It made colors look more vivid and gave the surface a smooth, polished appearance. The ingredient contains up to 50% nanoparticles, meaning particles so small they measure less than 100 nanometres across.
In 2021, the European Food Safety Authority concluded that titanium dioxide “can no longer be considered safe as a food additive.” The critical concern was genotoxicity, which means the substance has the potential to damage DNA inside cells. DNA damage is significant because it can lead to cancer over time. EFSA’s panel noted that while the body absorbs relatively little titanium dioxide after swallowing it, the particles can accumulate in the body. Because scientists couldn’t rule out genotoxicity, they were also unable to establish any safe daily intake level. The EU formally banned titanium dioxide in food products starting in 2022.
Animal research has added more detail to these concerns. A study published in the journal Gut found that titanium dioxide nanoparticles worsened intestinal inflammation in mice by activating a specific inflammatory pathway. The particles increased the production of reactive oxygen species (essentially, molecules that cause cellular stress) and made the gut lining more permeable. Researchers also found elevated titanium levels in the blood of people with active ulcerative colitis, suggesting that when the gut barrier is already compromised, more of these nanoparticles can cross into the bloodstream.
Artificial Dyes and Warning Labels
Beyond titanium dioxide, the synthetic food dyes in Skittles face restrictions across Europe. Since 2010, the EU has required that any food containing one of six specific synthetic dyes carry a warning label stating the colors “may have an adverse effect on activity and attention in children.” Three of those six dyes are commonly found in American candy: Red 40, Yellow 5, and Yellow 6.
The warning requirement traces back to a clinical trial published in The Lancet, one of the world’s most respected medical journals, which found that a mix of food colorings including Red 40, Yellow 5, and Yellow 6 increased hyperactive behavior in children. California’s Office of Environmental Health Hazard Assessment later reviewed the broader body of research and reached a similar conclusion, finding that Yellow 5 in particular may contribute to inattentiveness and hyperactivity in sensitive children.
These dyes aren’t banned in Europe, but the mandatory warning labels have a powerful market effect. Most candy and snack manufacturers reformulate their European products with natural colorants rather than print a warning about children’s behavior on the packaging. That’s why European Skittles look slightly different from their American counterparts: the colors come from plant-based sources instead of petroleum-derived dyes.
How the U.S. Approach Differs
The FDA still permits titanium dioxide as a food additive and does not require behavioral warning labels on products containing synthetic dyes. This regulatory gap meant that for years, American consumers were eating a version of Skittles with ingredients that European regulators had deemed unsafe or concerning enough to restrict.
California became the first U.S. state to push back. In 2023, Governor Gavin Newsom signed the California Food Safety Act, which prohibits the manufacture or sale of food products in the state containing brominated vegetable oil, potassium bromate, propylparaben, or Red Dye No. 3 after January 1, 2027. While that law doesn’t cover titanium dioxide directly, it signaled a growing willingness by U.S. lawmakers to follow Europe’s lead on food additive safety.
Mars Eventually Removed Titanium Dioxide
The story of how Mars handled titanium dioxide is a telling one. In 2016, the Center for Food Safety met with Mars executives and secured a commitment to remove titanium dioxide from all their candies by 2021. Mars missed that deadline. According to the Center for Food Safety, Mars communicated that although the EU was forcing their hand in Europe, the company would not honor its U.S. commitment until American laws required it.
That changed in May 2025, when Mars confirmed it had finally removed titanium dioxide from Skittles sold in the United States. The reformulation came nearly a decade after the original pledge and three years after the EU ban took effect. For most of that intervening period, Mars was selling two different versions of the same product: a reformulated one for countries with stricter regulations and the original for the American market.
The delayed response highlights a broader pattern in the food industry. Companies often have the ability to reformulate products but wait until regulation or public pressure forces the change. In this case, the same candy was made without titanium dioxide for European consumers while American consumers continued eating the older version, not because a safer recipe didn’t exist, but because U.S. law didn’t demand it.
What This Means for Consumers
If you’re eating Skittles purchased in the U.S. today, they no longer contain titanium dioxide. However, many other American food products still use the ingredient. It appears in coffee creamers, frosting, salad dressings, and other processed foods as a whitening agent. Checking ingredient labels is the only reliable way to know whether a product contains it.
The synthetic dye situation remains unchanged in the U.S. Red 40, Yellow 5, and Yellow 6 are still widely used without any required warnings. If you’re concerned about the potential behavioral effects of these dyes on children, look for products that use natural colorants like beet juice, turmeric, or spirulina extract, which are increasingly common even among mainstream brands responding to consumer demand.