Does eating ultra-processed food expose you to more toxic chemicals?

What's actually in it

Ultra-processed foods include things like packaged snacks, instant noodles, frozen pizzas, soft drinks, breakfast cereals, and deli meats. What makes them "ultra-processed" isn't just one ingredient. It's that they've been through multiple industrial steps and contain additives like emulsifiers, artificial flavors, colorings, and preservatives that you wouldn't use in a home kitchen.

Beyond the intentional additives, ultra-processed foods pick up chemicals from their plastic packaging, processing equipment, and cooking methods. The more steps between a farm and your plate, the more chances for chemicals to get into the food.

What the research says

A 2026 controlled study in the Journal of Nutrition did something most studies don't: it chemically analyzed two carefully matched diets, one high in ultra-processed foods and one free of them. Both diets had the same calories, fat, sugar, and fiber. The only difference was the level of processing.

The ultra-processed diet contained measurably higher levels of harmful chemicals. These included substances that migrate from packaging, chemicals created during industrial heating and processing, and additives that don't appear in whole foods.

People who ate the ultra-processed diet also showed markers linked to higher diabetes risk. When they switched to the unprocessed diet, those markers improved. The study showed a direct connection between the chemical load in processed food and metabolic health.

This matters because ultra-processed foods make up more than 50% of calories in the average American diet. That's a lot of daily chemical exposure from food alone.

You don't have to cook everything from scratch. But swapping out a few ultra-processed items each week, like choosing fresh fruit over packaged snacks or cooking rice instead of eating instant noodles, can cut your chemical exposure and protect your metabolism over time.