Food color has become one of the most talked-about topics in nutrition, and for once it is not just wellness noise. In 2025 the FDA revoked a long-standing red dye, then announced a plan to push the rest of the petroleum-based dyes out of the food supply, several states passed their own bans, and big brands started reformulating. Underneath the headlines sits a simpler question most people actually want answered: are natural colors really safer than synthetic ones, or is that just a nice story on the label? This guide walks through what these colorants are, how they are made, what the evidence says issue by issue, exactly what changed in the rules, and where supplements fit in. The honest answer is more interesting than either side of the internet will tell you.
The honest version
Natural is not automatically safer, and synthetic is not automatically dangerous. Most approved synthetic dyes sit within intake limits for most people, but there are a few real, specific concerns: Red 3 was pulled over rat tumors, titanium dioxide is banned in Europe over a genotoxicity question, and a mix of dyes has been linked to more hyperactivity in a subset of children. Natural colors sidestep those particular worries, but they come with real tradeoffs of their own, in stability, cost, color range, and even allergens like insect-derived carmine. And here is the part both sides skip: color, natural or synthetic, adds no nutrition, so a brightly colored ultra-processed snack is not a health food either way.
The short version
- The rules changed in 2025. The FDA revoked Red 3 in January 2025 and, in April 2025, asked makers to voluntarily drop six petroleum dyes by the end of 2026.
- "Natural" is not a safety guarantee. It means the color came from a plant, mineral, algae, or insect, not that it is better studied or risk-free.
- The real concerns are specific, not blanket: Red 3 (a rat-tumor and legal issue), titanium dioxide (an EU genotoxicity question), and a behavior signal in some children.
- Natural colors have tradeoffs: they fade with heat and light, cost more, offer a narrower palette, and carmine comes from insects.
- Supplements are not exempt. Gummies and chewables are the most-dyed products, and you can check any label for them.
What "color additives" actually are
In US regulation, anything added to color a food, drug, cosmetic, or supplement is a "color additive," and the law splits them into two buckets. Certified colors are the synthetic dyes, the ones with names like Red 40 and Yellow 5. They are called certified because every manufactured batch has to be sent to the FDA for chemical testing before it can be sold. Colors exempt from certification are the ones from natural sources, such as beet juice, turmeric, and spirulina; they still need FDA approval to be used, but individual batches are not certified.
That legal line, certified versus exempt, is really the synthetic-versus-natural line in official language. It is worth knowing because it shapes how these colors appear on labels, and because "exempt from certification" is not a safety ranking. It is a sourcing category. Colors of both kinds are also a type of inactive or other ingredient, added for appearance rather than nutrition or function.
Why color food at all? Mostly to meet expectations. We read color as a cue for flavor and freshness, processing and storage can wash color out, and brands use color for identity. None of that is sinister, but none of it is nutritional either, which is the quiet fact under the whole debate.
The common synthetic dyes, and how they are made
The FDA has historically permitted nine certified synthetic color additives for food. Seven are the ones you actually see, plus two rarely used specialty colors (Orange B, once used in sausage casings, and Citrus Red 2, used only on some orange peels), both of which the agency is now moving to revoke. Here are the ones that matter in practice.
| Dye | Color | Also called | Commonly in |
|---|---|---|---|
| Red 40 | Red-orange | Allura Red, E129 | The most-used US dye: sodas, candy, cereal, sports drinks, gummies |
| Yellow 5 | Yellow | Tartrazine, E102 | Chips, candy, drinks, pickles |
| Yellow 6 | Orange-yellow | Sunset Yellow, E110 | Snacks, candy, baked goods |
| Blue 1 | Bright blue | Brilliant Blue, E133 | Drinks, candy, ice cream |
| Blue 2 | Deep blue | Indigotine, E132 | Candy, some pet foods |
| Green 3 | Green | Fast Green, E143 | Rare in the US: some drinks and candy |
| Red 3 | Cherry pink | Erythrosine, E127 | Being removed: was in some candy and maraschino cherries |
How are they made? These dyes are synthesized from petroleum, which is why regulators now call them "petroleum-based," and historically they were derived from coal tar, which is where the old scary phrase comes from. Several are "azo" dyes, built around a particular nitrogen-based chemical bond. The word petroleum sounds alarming, but the finished dye is a defined, purified molecule, and the certification step exists specifically to test each batch and cap trace contaminants like lead and benzidine below legal limits. The concerns worth having are about a few specific dyes, covered below, not about the vague fact that the starting material was crude oil.
The common natural colors, and where they come from
Natural colors, the exempt category, are pulled from plants, algae, minerals, and in one notable case insects. They are the tools brands are turning to as they drop synthetics, so it helps to know the cast.
| Source | Color it gives | Worth knowing |
|---|---|---|
| Beet juice (betalains) | Red to pink | Fades with heat and light; can taste faintly earthy |
| Turmeric (curcumin) | Yellow | Bright but light-sensitive; can carry an earthy note |
| Annatto | Yellow to orange | Common in cheese and snacks; an occasional allergen |
| Carmine (cochineal) | Deep red | Made from insects: not vegan, and a rare true allergen |
| Paprika (oleoresin) | Orange to red | Can add a mild flavor |
| Spirulina extract | Blue | The main natural blue; sensitive to heat and acidity |
| Anthocyanins (grape, cabbage, black carrot) | Red, purple, blue | Color shifts with pH: red in acid, bluer near neutral |
| Chlorophyll | Green | From plants; can be less vivid than synthetic green |
| Beta-carotene | Orange to yellow | Also a nutrient (vitamin A precursor) |
| Caramel color | Brown | Very widely used, in colas and sauces |
| Titanium dioxide | White | A mineral opacifier, not a hue; the subject of its own debate |
A couple of these deserve a flag. Titanium dioxide is technically a natural, mineral-derived color, but it is at the center of the safety argument below, so "natural" clearly does not settle anything. And carmine is the reminder that natural can mean animal-derived: it is made from crushed cochineal insects, which matters for vegans, some religious diets, and the small number of people who are genuinely allergic.
The safety debate, issue by issue
Blanket claims that dyes are "toxic" or perfectly "safe" both fall apart on contact with the evidence, because the real story is issue-specific. Here are the three concerns that actually drive the science and the rules.
Hyperactivity in children: the Southampton study
The most influential piece of evidence is a 2007 UK trial often called the Southampton study. Researchers gave 297 children (3-year-olds and 8-to-9-year-olds from the general population, not a clinical group) drinks containing mixes of artificial colors plus the preservative sodium benzoate, or a placebo, in a rigorous crossover design. The conclusion was that these additives increased hyperactivity in the children on average. That single study is why the European Union requires foods with any of six named colors to carry the warning "may have an adverse effect on activity and attention in children." A 2021 California review reached a similar bottom line and argued that decades-old US intake limits may not fully protect children's behavior. The honest caveats: the effect was modest, it varied a lot from child to child, the test mixed dyes with a preservative, and the FDA's own advisory committee concluded in 2011 that a causal link in the general population had not been established, while allowing that some sensitive children may react.
McCann D et al., Lancet, 2007;370(9598):1560-1567. PMID 17825405. · California OEHHA, 2021 assessment, and Miller MD et al., Environ Health, 2022;21:45. · FDA Food Advisory Committee, 2011.
The two colors with the most specific concerns
Red 3 (erythrosine). At high doses in the diet, Red 3 caused thyroid tumors in male rats. Under the Delaney Clause, a US law that forces removal of any additive shown to cause cancer in animals or people regardless of dose, that finding was enough to require its removal from food. The nuance the headlines drop: the tumor mechanism is hormonal and specific to male rats, and the FDA itself has said it does not appear to happen in humans at the levels people actually eat. The ban is a legal trigger, not proof that Red 3 gives people cancer.
Titanium dioxide. In 2021 the European Food Safety Authority concluded it could no longer be considered safe as a food additive because it could not rule out genotoxicity, effects on DNA, and the EU banned it in 2022. That is not a finding that it causes cancer, but it is a real disagreement: the FDA still allows titanium dioxide in the US at up to 1 percent of a food's weight. Allowed here, banned in Europe.
And a clarification on Red 40: despite the online worry, Red 40 was not banned for cancer. It is simply part of the voluntary phase-out of petroleum dyes. The evidence on Red 40 and cancer is not conclusive, so keep it separate from the Red 3 story.
Put together, the fair reading is that the approved synthetic dyes are, for most people at normal intakes, within the safety margins the FDA sets, but that a handful of specific, legitimate concerns, plus a genuine behavior signal in some children, are enough to explain why regulators are moving even though no dye has been proven to broadly harm the general public.
What changed in 2025, and what is coming in 2026
2025 was the year the rules actually moved, after decades of debate. Here is the accurate version, because the headlines blurred a lot of it together.
- January 2025: Red 3 revoked. The FDA pulled the authorization for Red 3 in food and ingested drugs, on the Delaney Clause basis above. Companies have until January 2027 to remove it from food and January 2028 from ingested drugs, though the agency later urged them to move faster.
- April 2025: a voluntary phase-out plan. The FDA and the Department of Health and Human Services announced an intention to phase petroleum-based dyes out of the food supply, asking makers to remove six dyes (Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2, and Green 3) by the end of 2026. This is the part most often misreported: for those six, it is a voluntary understanding with industry, not a binding ban. The agency separately said it would formally revoke the two niche colors, Orange B and Citrus Red 2.
- New natural colors approved. To give makers alternatives, the FDA approved several new natural-source colors across 2025 in two rounds, not all at once: galdieria extract blue (from red algae), calcium phosphate (a white), and an expansion of butterfly pea flower extract (blue to purple) in May 2025, then gardenia blue in July 2025. Stable natural blues have long been the hardest gap, so these matter.
- State laws went further. California's 2023 Food Safety Act bans Red 3 (and a few non-color additives) statewide from 2027, and its 2024 School Food Safety Act bars six dyes from public-school food. West Virginia passed the broadest measure, phasing a slate of synthetic dyes out of school meals from August 2025 and, on paper, out of food sold statewide from 2028, though a court has since paused that statewide part while a legal challenge plays out. More states are considering similar bills.
All of this sits under the federal "Make America Healthy Again" banner the agencies themselves used in 2025. Whatever you think of the politics, the practical effect is real: the color of packaged food in the US is going to shift toward natural sources over the next couple of years, mostly by agreement and state law rather than by a single national ban.
Colorants in supplements and gummies
This is the part that gets left out of most food-dye coverage, and it is squarely NutraSmarts territory. Supplements are colored too, and the same rules and reformulation wave apply to them. Gummy vitamins and chewables are the most-dyed products in the aisle, often using Red 40, Yellow 5, Yellow 6, and Blue 1, plus titanium dioxide for that opaque, candy-like look, and powders and drink mixes use dyes to color-code flavors. Because Red 3's revocation explicitly covers ingested drugs, some supplement and medicine makers are reformulating on the same clock as food.
The irony is not lost on anyone who reads labels: a product sold for health can be dyed as heavily as candy, especially when it is aimed at kids. "Clean label" supplements respond by using the natural colors above, beet or black carrot for red, spirulina for blue, turmeric or beta-carotene for yellow, or by skipping color entirely and accepting a duller tablet. None of that changes whether the supplement is worth taking, but if avoiding synthetic dyes matters to you, it is easy to check. Our free Supplement Facts tool and our guide to reading a supplement label both help you spot exactly what is in the "other ingredients" line.
Is natural actually safer, or just better marketing?
Here is the question the whole topic circles, answered straight. Choosing a natural color does let you sidestep the specific concerns tied to certain synthetic dyes, and it removes the behavior question for sensitive children, which is a legitimate reason some families prefer it. But "natural" is a sourcing word, not a safety grade. Natural colors are not automatically better studied, titanium dioxide is natural and is the one Europe banned, carmine is natural and comes from insects, and any color can in principle cause a reaction in someone. Swapping the dye also does nothing for the food itself, which is usually just as processed and sugary as before.
It also helps to understand why brands used synthetics in the first place, because those are the tradeoffs of going natural.
| Attribute | Synthetic dyes | Natural colors |
|---|---|---|
| Brightness | Very vivid, precise shades | Often softer or duller |
| Stability | Hold up to heat, light, and pH | Can fade or shift color; anthocyanins change with pH |
| Color range | Full, including stable blue and green | Narrower; stable blues were long the hard gap |
| Cost and amount | Cheap; a little goes a long way | Pricier; often need more to match a shade |
| Consistency | Uniform batch to batch | Can vary with the crop or source |
| Main watch-outs | Red 3 and titanium dioxide issues; behavior signal in some kids | Allergens like carmine; still adds no nutrition |
So the mature take is neither "dyes are poison" nor "natural is marketing." If a specific concern applies to you, a sensitive child, an allergy, an ethical or religious reason to avoid carmine, choosing colors accordingly is sensible. For everyone else, the color is one of the least important things about a packaged food, and the ingredients before the color line matter far more.
How to read a label and spot the colors
You do not need a chemistry degree to see what is coloring your food or supplement, just a couple of rules.
- Synthetic dyes must be named. They appear specifically as Red 40, Yellow 5, Blue 1, and so on, sometimes by chemical name such as Allura Red or Tartrazine. If you see a numbered color, it is a certified synthetic.
- Natural colors can be vaguer. They may be listed as "color added," "colors," "vegetable juice for color," or by source. The big exception is carmine and cochineal, which since 2011 must be named specifically because of allergy risk.
- Pale does not mean dye-free. Butter-yellow crackers, pink yogurts, and light-green candies are often colored too. Do not judge by how bright it looks.
- On supplements, scan the "other ingredients" line, where colors live alongside fillers and coatings. Gummies and chewables are the likeliest to be dyed.
Frequently asked questions
Are natural food dyes safer than synthetic ones?
Not automatically. A color being plant, algae, or mineral derived does not make it better studied or risk-free, and natural colors have their own issues, such as carmine, which comes from insects and can trigger allergic reactions. What is fair to say is that natural colors avoid the specific concerns tied to a few synthetic dyes, and that neither kind adds any nutrition. If a natural color helps you avoid a dye you want to skip, that is a reasonable personal choice, but do not assume natural equals healthier or that a naturally colored ultra-processed food is a health food.
Why was Red Dye 3 banned but not Red 40?
They are different situations. In January 2025 the FDA revoked Red 3 for food and ingested drugs because it caused thyroid tumors in male rats at high doses, which legally triggers the Delaney Clause, a rule that forces removal of any additive shown to cause cancer in animals or people, regardless of dose or human relevance. The FDA itself notes the rat mechanism does not appear to occur in humans at normal intakes. Red 40 was not banned for cancer. It is part of a separate, voluntary plan announced in April 2025 to phase petroleum-based dyes out of the food supply by the end of 2026.
Are food dyes linked to ADHD or hyperactivity?
There is a modest signal in a subset of children, not proof that dyes cause ADHD. A well-known 2007 UK trial (the Southampton study) found that a mix of artificial colors plus a preservative increased hyperactivity in some children in the general population, which is why the European Union requires a warning label on foods with those colors. A 2021 California review concluded dyes can affect activity and attention in some children and that old intake limits may not fully protect them. The FDA's position is that a causal link in the general population has not been established, while acknowledging some sensitive children may react. Sensitivity varies a lot from child to child.
Which food dyes are being banned or phased out in 2025 and 2026?
Red 3 is the only one actually revoked so far: the FDA pulled its food authorization in January 2025, with compliance required by January 2027 for food and January 2028 for ingested drugs. Separately, in April 2025 the FDA announced a voluntary plan asking makers to remove six petroleum-based dyes (Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2, and Green 3) by the end of 2026. That is a request, not a binding ban. Several states have gone further with their own laws, and the agency is also moving to revoke two rarely used colors, Orange B and Citrus Red 2.
Is titanium dioxide safe to eat?
It depends on which regulator you ask. Titanium dioxide is a mineral white used to make foods and coatings opaque. In 2021 the European Food Safety Authority concluded it could no longer be considered safe as a food additive because a concern about genotoxicity could not be ruled out, and the EU banned it in 2022. Importantly, that is not the same as finding it causes cancer. The FDA still permits titanium dioxide in the US at up to 1 percent of a food's weight and maintains it is safe as used, though a petition to reconsider is pending. So it is allowed here and banned in Europe, which is a genuine regulatory disagreement rather than a settled answer.
What is carmine made from, and is it vegan?
Carmine, also labeled cochineal extract, is a red color made from the dried bodies of the cochineal insect, so it is not vegan or vegetarian, and many people consider it not kosher or halal. It is also one of the few colors that can cause true allergic reactions, including rare severe ones, in sensitive people. Because of that, since 2011 the FDA has required carmine and cochineal to be listed by name on labels rather than hidden under a generic color term. Ironically, a synthetic dye like Red 40 contains no animal product and is technically vegan, so natural does not always mean animal-free.
How can I tell if a food or supplement has artificial dyes?
Read the ingredient list. Synthetic certified dyes must be named specifically, so you will see Red 40, Yellow 5, Blue 1, and the like, sometimes by their chemical names such as Allura Red or Tartrazine. Natural colors can be grouped less specifically as color added, colors, or vegetable juice for color, with the exception of carmine and cochineal, which must be named. Do not assume pale or pastel products are dye-free, since butter-yellow, pink, and light-green items are often colored too. On supplements, gummies and chewables are the most likely to contain dyes, and our free Supplement Facts tool and label guide can help you decode a panel.
The bottom line
Food color is a genuinely interesting case of the truth sitting between two loud camps. Synthetic dyes are not the poison some corners of the internet claim: most are within the FDA's intake limits for most people, and "made from petroleum" describes the starting material, not a verdict. But they are not above scrutiny either, because Red 3 earned a legal ban, titanium dioxide split the US and Europe, and a real behavior signal in some children is enough to justify caution and the 2025 push toward natural colors. Natural colors are a reasonable choice if a specific concern applies to you, but they are a sourcing decision with tradeoffs, not a health upgrade, and they add no nutrition. The most useful habit is not to fear the rainbow but to read the label, decide what you personally want to avoid, and remember that the color is almost always the least important ingredient in the package. For the ingredients that surround it, see our guides to supplement other ingredients and whole-food versus synthetic.