“Ultra-processed” has become one of those nutrition terms that sounds self-explanatory. Chips? Obviously. Soda? Sure. A neon-colored snack containing ingredients you need three attempts to pronounce? Case closed.

But then things get complicated.

What about whole-grain packaged bread? Flavored yogurt? Breakfast cereal? Plant-based milk? Protein bars?

Suddenly, figuring out what counts as ultra-processed food, or UPF, requires more than looking at a package and deciding whether it seems suspicious.

Processed Doesn’t Automatically Mean Unhealthy

Almost everything we eat has been processed in some way. Frozen vegetables are processed. Milk is pasteurized. Oats are rolled. Beans are canned.

Food processing can improve safety, extend shelf life, make nutrients more available, and simply make food easier to prepare.

The concern around ultra-processed foods is different.

Much of the research uses the NOVA classification system, which separates foods into four groups based largely on how they are processed. Its fourth category, ultra-processed foods, generally includes industrial formulations containing ingredients or additives not commonly used in home cooking.

Think soft drinks, packaged snack foods, instant noodles, some frozen meals, confectionery, and many other highly formulated products.

The tricky part is that UPFs are an incredibly broad group.

A sugary soda and a packaged whole-grain bread may both qualify under some classifications, despite having very different nutritional profiles. This has led researchers to debate whether processing itself is the problem, or whether some of the health risk comes from what many UPFs also tend to contain: more sodium, added sugars, refined carbohydrates, unhealthy fats, and calories, with less fiber and other beneficial nutrients.

Why Are Scientists Concerned?

There is a good reason for all the attention.

A major 2024 umbrella review published in The BMJ examined 45 pooled analyses involving nearly 10 million people. Higher UPF consumption was associated with increased risks across a wide range of health outcomes, with some of the strongest evidence involving cardiovascular disease-related mortality, type 2 diabetes, common mental disorders, and overall mortality.

Another 2024 umbrella review similarly found associations between higher UPF intake and numerous adverse health outcomes.

But there is an important word here: associated.

Much of this evidence comes from observational research. That can reveal important patterns, but it does not automatically prove that processing alone caused the health outcome. People who eat large amounts of UPFs may differ in many other ways, including overall diet, physical activity, income, smoking, and access to fresh food.

Researchers are still trying to untangle those factors.

So…What Exactly Is an Ultra-Processed Food?

That question is now important enough that regulators are trying to answer it more precisely.

The FDA and USDA have been working toward a uniform definition of ultra-processed foods, partly because there currently isn’t one universally accepted definition suitable for regulation and public policy.

And defining UPFs isn’t just an academic exercise.

If governments eventually use the term in dietary guidelines, food labels, school nutrition programs, or other policies, consumers need to know exactly what qualifies. “You’ll know it when you see it” isn’t particularly useful in the cereal aisle.

What Should You Actually Eat?

Until the terminology catches up with the science, you don’t need to conduct a forensic investigation of every ingredient label.

A more practical approach is to look at your overall eating pattern.

Prioritize fruits, vegetables, legumes, whole grains, nuts, seeds, and minimally processed foods when possible. When buying packaged foods, consider the bigger nutritional picture: fiber, protein, added sugar, sodium, saturated fat, and portion size.

And yes, convenience foods can still have a place.

Nutrition does not have to become a purity contest where eating one frozen dinner requires a formal apology to your body.

Ultra-processed foods deserve scientific attention, particularly given the growing evidence linking high consumption with poorer health outcomes. But the term itself is still evolving, and not every food inside that enormous category is nutritionally identical.

So, what counts as ultra-processed?

We’re getting closer to an answer.

Until then, perhaps the better question at the grocery store isn’t simply, “Was this processed?”

It’s “What is this food actually bringing to my diet?”

That question is a lot harder to fit into a viral headline, but it may be far more useful.

Sources and More Information:

Dai, S., Wellens, J., Yang, N., Li, D., Wang, J., Wang, L., Yuan, S., He, Y., Song, P., Munger, R., Potvin Kent, M., MacFarlane, A. J., Mullie, P., Duthie, S., Little, J., Theodoratou, E., & Li, X. (2024). Ultra-processed foods and human health: An umbrella review and updated meta-analyses of observational evidence. Clinical Nutrition, 43(6), 1386–1394. https://doi.org/10.1016/j.clnu.2024.04.016.

Lane, M. M., Gamage, E., Du, S., Ashtree, D. N., McGuinness, A. J., Gauci, S., Baker, P., Lawrence, M., Rebholz, C. M., Srour, B., Touvier, M., Jacka, F. N., O’Neil, A., Segasby, T., & Marx, W. (2024). Ultra-processed food exposure and adverse health outcomes: Umbrella review of epidemiological meta-analyses. BMJ, 384, e077310. https://doi.org/10.1136/bmj-2023-077310.

U.S. Food and Drug Administration. (2025). Ultra-processed foods. https://www.fda.gov/food/nutrition-food-labeling-and-critical-foods/ultra-processed-foods.