Every day, millions of Americans consume food products containing additives that have been linked to cancer, neurological damage, hormonal disruption, and chronic disease. Many of these substances are banned in other countries. Most consumers have never heard of them.
We call them The Dirty 25 — the 25 most concerning food additives currently hiding in everyday American food products.
Here are the top 10 from the list. For the full Dirty 25 with detailed health research on each one, use our interactive Dirty 25 lookup tool.
1. High-Fructose Corn Syrup (HFCS)
Found in: Bread, ketchup, yogurt, cereal, salad dressing, soda — thousands of products.
Why it's bad: Your body processes HFCS differently than regular sugar. It bypasses the normal insulin response, goes directly to the liver, and is converted to fat. It's been linked to obesity, fatty liver disease, insulin resistance, and metabolic syndrome. It's also one of the cheapest sweeteners to produce, which is why the food industry puts it in everything.
2. Titanium Dioxide
Found in: Candy, frosting, coffee creamer, chewing gum.
Why it's bad: Used to make food look whiter. Banned in the EU since 2022 for genotoxicity concerns (DNA damage). Still widely used in the US.
3. Sodium Nitrite / Sodium Nitrate
Found in: Hot dogs, bacon, deli meats, sausages, jerky.
Why it's bad: When heated or combined with stomach acid, nitrites form nitrosamines — compounds classified as probable human carcinogens by the WHO. The World Health Organization classifies processed meats containing nitrites in the same carcinogen category as tobacco.
4. Artificial Food Dyes (Red 40, Yellow 5, Yellow 6, Blue 1)
Found in: Candy, cereal, sports drinks, mac and cheese, baked goods.
Why they're bad: Derived from petroleum. Multiple studies link artificial dyes to hyperactivity and behavioral problems in children. The EU requires warning labels on foods containing these dyes. The UK has largely phased them out. The US has taken no action.
5. BHA & BHT (Butylated Hydroxyanisole / Butylated Hydroxytoluene)
Found in: Cereal, chips, chewing gum, frozen sausage, snack foods.
Why they're bad: Synthetic preservatives. The National Toxicology Program lists BHA as "reasonably anticipated to be a human carcinogen." Banned or restricted in the EU, Japan, and Australia. Still listed as GRAS (Generally Recognized as Safe) by the FDA.
6. Carrageenan
Found in: Almond milk, yogurt, ice cream, deli meat, infant formula.
Why it's bad: Derived from seaweed but heavily processed. Research links food-grade carrageenan to gut inflammation, digestive issues, and potential tumor promotion. Particularly concerning in products consumed daily like milk alternatives.
7. Potassium Bromate
Found in: Commercial bread, rolls, pizza dough.
Why it's bad: Classified as a possible carcinogen (Group 2B) by the IARC. Banned in the EU, UK, Canada, Brazil, China, and many other countries. Still legal in the US.
8. Monosodium Glutamate (MSG)
Found in: Chips, canned soup, frozen meals, fast food, snack mixes, ramen.
Why it's concerning: While the FDA considers MSG safe, it's an excitotoxin — it overstimulates nerve cells. Some people experience headaches, flushing, and digestive issues (sometimes called "MSG symptom complex"). It's also used to make food hyper-palatable, encouraging overeating.
9. Artificial Sweeteners (Aspartame, Sucralose, Acesulfame-K)
Found in: Diet soda, sugar-free products, protein bars, flavored water.
Why they're concerning: In 2023, the WHO issued guidance against using artificial sweeteners for weight control, citing evidence that they don't actually help with long-term weight loss and may increase the risk of type 2 diabetes, cardiovascular disease, and mortality. Aspartame was classified as "possibly carcinogenic" by the IARC in 2023.
10. Trans Fats (Partially Hydrogenated Oils)
Found in: Some margarine, baked goods, microwave popcorn, non-dairy creamers.
Why they're bad: Definitively linked to heart disease, stroke, and type 2 diabetes. The FDA banned artificial trans fats in 2018, but products manufactured before the deadline can still be sold, and some products contain small amounts that fall below the labeling threshold (0.5g per serving can be listed as "0g trans fat").
The Full List
These are just the top 10. The complete Dirty 25 includes dimethylpolysiloxane (silicone in french fries), azodicarbonamide (yoga mat chemical in bread), TBHQ, propyl paraben, and more.
Want to look up any additive instantly? Our Dirty 25 interactive tool lets you search any ingredient and get a plain-English breakdown of what it is, why it's used, and what the health concerns are — even if you can't spell it.
You can also search any food product on Rock the New Food Pyramid to instantly flag all concerning additives it contains.