Food dyes show up in far more products than most people expect. Beyond the obvious brightly colored candies and sodas, synthetic dyes are added to pickles, salad dressings, fresh oranges, and even farmed salmon. About 11% of packaged foods in the U.S. contain synthetic dyes overall, and that number jumps to 28% in the top categories marketed to children.
Sweet Foods and Drinks Are the Biggest Category
Candy, frosting, flavored drinks, popsicles, fruit snacks, and sweetened cereals are the most heavily dyed foods in the American food supply. These products rely on color to signal flavor: a red popsicle “looks” like cherry, a yellow candy “looks” like lemon. The same is true for sports drinks, flavored waters, and juice cocktails that contain only a small percentage of actual juice. If a product is brightly colored and shelf-stable, there’s a good chance it contains at least one synthetic dye.
Condiments and Sauces You Wouldn’t Suspect
Some of the most surprising sources of food dye sit in your refrigerator door. Sweet relish, dill pickles, and pickled ginger frequently contain Yellow 5 or Red 40 to intensify their color. Salad dressings are another common hiding spot. Kraft Creamy French dressing contains two yellow dyes. Hidden Valley’s Avocado Ranch contains Yellow 5, Yellow 6, and Blue 1. Catalina dressing uses Red 40, Yellow 6, and Blue 1.
Barbecue sauce, cocktail sauce, marinades, hot sauce, horseradish sauce, and certain green chile sauces can all contain synthetic colorants. Even some mayonnaise products are dyed. The pattern is consistent: if a condiment has a rich, uniform color, check the label.
Produce and Protein Aren’t Always Exempt
Fresh food can contain dyes too. Some oranges sold in the U.S. are treated with Citrus Red No. 2, a dye applied to the skin to make it a more uniform, appealing orange. Federal regulations limit its use to oranges not intended for juicing and cap the amount at 2 parts per million of the whole fruit’s weight. You’d never know from looking at the fruit in the store.
Farmed salmon is another example. Wild salmon gets its pink-red color naturally from the shrimp and krill it eats. Farmed salmon, which eat a controlled feed, would be gray without intervention. Producers add synthetically produced astaxanthin to the feed to recreate that familiar pink color. It’s not listed as an ingredient on the fish itself, since it’s part of the animal’s diet rather than a post-harvest addition.
Restaurant Food Is a Blind Spot
Restaurants in the U.S. are not required to disclose ingredients the way packaged food manufacturers are. That means the pickles on your burger, the dressing on your salad, or the sauce on your wings could contain synthetic dyes with no way for you to know. Fast food chains use many of the same commercial condiments and sauces sold in grocery stores, which frequently contain dyes. If you want to avoid them when eating out, your only option is to ask directly or check the chain’s ingredient list if they publish one online.
The Nine Approved Synthetic Dyes
The FDA currently certifies nine synthetic color additives for use in food:
- Red 40: The most widely used dye in the U.S., found in candy, cereals, snacks, beverages, and sauces.
- Yellow 5 (Tartrazine): Common in chips, pickles, mustard, and drinks. About 3.8% of people exposed to it in one study developed allergic reactions including hives, swelling, or respiratory symptoms, which resolved within 24 to 48 hours of removing the source.
- Yellow 6: Often paired with Yellow 5 in snack foods, baked goods, and sauces.
- Blue 1: Used in ice cream, candy, beverages, and surprisingly, salad dressings.
- Blue 2: Common in candies and pet foods.
- Green 3: Less common, found in some beverages and desserts.
- Red 3: Used in candy, baked goods, and maraschino cherries.
- Orange B: Restricted to certain hot dog and sausage casings.
- Citrus Red 2: Used only on the skins of whole oranges.
How to Spot Dyes on a Label
Manufacturers must list FDA-certified synthetic dyes by name on ingredient labels, either as the full name (FD&C Red No. 40) or the shortened version (Red 40). This makes them relatively easy to find if you scan the ingredients list. Natural colorants, however, follow different rules. Colors derived from sources like beet juice, turmeric, annatto, or carmine are exempt from individual naming requirements. They can be listed collectively as “artificial colors,” “color added,” or simply “colorings” without specifying which ones. So a product labeled “color added” could contain anything from beet juice to caramel coloring, and you won’t necessarily know which.
Why Some Countries Handle This Differently
Six of the dyes approved in the U.S. carry mandatory warning labels in the European Union. Since 2010, any food or drink in the EU containing Yellow 5, Yellow 6, Red 40, or three other synthetic dyes must display the statement: “may have an adverse effect on activity and attention in children.” This requirement grew out of research sometimes called the Southampton studies, which found a small but measurable increase in hyperactive behavior in children consuming these dyes. Across 24 controlled trials, the effect was modest, and more apparent in parent-reported behavior than in clinical assessments. Still, it was consistent enough for European regulators to require the warning. Many European manufacturers simply reformulated their products with natural colorants rather than add the label, which is why the same brand of candy or cereal can look noticeably different in Europe versus the U.S.
A Quick Checklist of High-Dye Foods
- Candy and gum: Nearly universal among brightly colored varieties.
- Breakfast cereals: Especially those marketed to children.
- Flavored beverages: Sports drinks, sodas, juice cocktails, flavored waters.
- Snack foods: Flavored chips, cheese puffs, crackers.
- Frozen treats: Popsicles, ice cream, sherbet.
- Baked goods: Frosted cakes, cookies, pastries.
- Pickles and relish: Particularly sweet varieties.
- Salad dressings: French, ranch, Italian, Catalina.
- Sauces: Barbecue, cocktail, hot sauce, some pasta sauces.
- Fruit snacks and gummies: Including vitamin gummies.
- Farmed salmon: Dyed through feed rather than direct addition.
- Some fresh oranges: Dyed on the skin before sale.