Red 40 is not banned in the United States. It remains one of the most widely used food dyes in the country, permanently approved by the FDA for use in food, drugs, and cosmetics. In the European Union, Red 40 is also legal but requires a warning label linking it to hyperactivity in children. No major country has outright banned it, though the regulatory approach varies significantly depending on where you live.
Red 40’s Legal Status in the U.S.
The FDA classifies Red 40 (officially called FD&C Red No. 40) as a permanently listed color additive. It’s approved under federal regulations for use in food, drugs, and cosmetics, and there is currently no federal restriction, required warning label, or intake cap enforced at the consumer level. Red 40 is the single most common artificial food dye in the American food supply, showing up in candy, cereal, sports drinks, snack foods, and even medications.
The joint WHO/FAO expert committee on food additives sets the acceptable daily intake at 0 to 7 milligrams per kilogram of body weight. For a 150-pound adult, that works out to roughly 475 mg per day. Most people consume far less, but children who eat a lot of brightly colored snacks and drinks can reach a higher proportion of that threshold relative to their size.
How Europe Handles It Differently
The European Union has not banned Red 40 either, but it treats the dye with more caution than the U.S. does. Any food or drink sold in the EU that contains Red 40 (listed as E129 on European labels) must carry a warning stating: “May have an adverse effect on activity and attention in children.” This requirement applies to five other artificial colors as well.
That mandatory warning has had a practical effect that goes beyond regulation. Many European food manufacturers have voluntarily reformulated their products to avoid the label, swapping synthetic dyes for natural alternatives like beet juice or paprika extract. The result is that Red 40 is far less common on European shelves, even though it’s technically legal. This is why you’ll sometimes hear people say Red 40 is “banned in Europe.” It isn’t, but the warning label has made it commercially unappealing for many brands.
U.S. States Pushing for Restrictions
While the federal government hasn’t moved to restrict Red 40, several states are taking their own steps. California passed the California Food Safety Act in 2023, which banned certain food additives, though it targeted Red Dye No. 3 rather than Red 40. New York has introduced a similar bill, the Food Safety and Chemical Disclosure Act, which has passed the state senate and was referred to an Assembly committee as of early 2026. That bill also focuses on Red No. 3, potassium bromate, and propylparaben rather than Red 40 specifically.
So far, no U.S. state has passed legislation banning Red 40. But the growing wave of state-level food safety bills suggests the regulatory conversation around synthetic dyes is shifting. Red 40 could eventually face restrictions if the political momentum continues, though nothing is imminent.
Why Red 40 Is Controversial
The concern centers primarily on children’s behavior. A landmark 2007 study published in The Lancet tested two different mixtures of artificial food colors (including Red 40) and a preservative on three-year-olds and eight- to nine-year-olds. Children who consumed the dye mixtures showed measurably increased hyperactivity compared to those given a placebo. The effect was statistically significant in both age groups, and the researchers concluded that artificial colors or preservatives in the diet increase hyperactivity in children from the general population, not just those already diagnosed with attention disorders.
This study was the primary driver behind the EU’s decision to require warning labels. The FDA reviewed the same evidence and concluded it did not warrant regulatory action, though the agency acknowledged that some children may be sensitive to food dyes. The disagreement between U.S. and European regulators isn’t really about the science itself. It’s about how much precaution to apply when the evidence shows a real but relatively modest effect.
What Red 40 Is Made From
Red 40 is a synthetic dye made from petroleum. It belongs to a class of chemicals called azo dyes, which get their color from a specific molecular structure involving nitrogen atoms. It is not derived from any natural food source.
One lesser-known concern involves impurities in the manufacturing process. Laboratory analyses have detected trace amounts of chemicals called aromatic amines, specifically p-cresidine and aniline, in commercial batches of Red 40. These are compounds that raise safety flags because of their potential links to cancer at higher exposures. The amounts detected were extremely small (in the parts-per-billion range), but monitoring of dye batches for these contaminants is not routinely done, which some researchers have flagged as a gap in oversight.
How to Find It on Labels
Red 40 goes by many names depending on the country and context. On U.S. food labels, you’ll see it listed as “Red 40” or “FD&C Red No. 40.” In Europe, it appears as “E129” or “Allura Red AC.” Other names used in international trade and scientific literature include:
- Allura Red
- Food Red 17
- C.I. 16035
- Curry Red
- Fancy Red
If you’re trying to avoid it, checking ingredient lists for “Red 40” will catch it on most products sold in the U.S. For imported foods or cosmetics, scanning for E129 or Allura Red covers the international variations. The dye appears not just in obviously red foods but also in products that are orange, purple, or brown, where it’s blended with other colors to achieve the desired shade.