Should You Avoid All Ultra-Processed Foods? What the Evidence Really Says
Ultra-processed foods have become one of the most debated subjects in nutrition. Cookies, sugary breakfast cereals, soft drinks, chips, ready-made meals, confectionery, processed meats, packaged desserts and other convenient products now occupy a significant place in modern diets.
As more studies have linked high consumption of these foods with a range of health problems, one question naturally follows: should people simply eliminate every ultra-processed food from their diet?
The answer is more nuanced than a simple yes or no.
Current evidence shows that high consumption of ultra-processed foods is associated with a greater risk of several health problems, particularly cardiometabolic conditions and higher mortality. However, this does not mean that every food classified as ultra-processed carries exactly the same risk, or that a food should automatically be considered unhealthy solely because of its level of processing.
What exactly is an ultra-processed food?
The concept of ultra-processed food comes largely from the NOVA classification system. It goes beyond simply asking whether a food has been cooked, packaged or preserved.
Ultra-processed foods are generally industrial formulations containing multiple ingredients and often substances or additives that are not commonly used in home cooking. They are frequently designed to be convenient, highly palatable, easy to consume and shelf-stable.
The category includes many different products: sugary drinks, packaged snacks, confectionery, cookies, some ready-to-eat meals, instant noodles, processed meat products and certain industrial desserts.
However, the classification has limitations. Two foods placed in the same category can have very different nutritional profiles. A recent critical review argued that NOVA can group together products whose nutritional effects are not necessarily equivalent.
Why are scientists so concerned about these foods?
Ultra-processed food consumption has increased substantially in many countries alongside changes in lifestyles and food environments.
The WHO notes that diets high in ultra-processed foods are often rich in free sugars, sodium and less favorable fats, while providing fewer naturally nutrient-rich foods and less dietary fiber. The organization is also developing specific guidance on ultra-processed food consumption.
The concern is therefore not necessarily one single ingredient. It may reflect the combination of several characteristics: high energy density, substantial amounts of salt or sugar, low fiber content, large portions that can be consumed quickly and strong palatability.
What do studies show about health?
A major umbrella review published in the BMJ in 2024 examined evidence from numerous meta-analyses concerning ultra-processed food consumption.
Higher exposure was associated with a greater risk of several adverse health outcomes, particularly cardiometabolic disease, some mental health outcomes and mortality. However, the authors also emphasized an important limitation: for many of the associations examined, the certainty of evidence was low or very low.
This means that individual associations should not automatically be presented as proven cause-and-effect relationships.
Someone who eats large amounts of ultra-processed food may also have a less diverse diet, lower physical activity, poorer sleep or other risk factors. Researchers can adjust for many of these variables, but observational studies cannot completely eliminate every potential source of confounding.
What about cardiovascular health?
The relationship with cardiovascular health is one of the areas receiving considerable attention.
A European study coordinated by the International Agency for Research on Cancer and published in 2025 followed almost 430,000 participants from nine European countries for an average of nearly 16 years. Higher consumption of ultra-processed foods was associated with higher all-cause mortality and higher mortality from several causes, including circulatory and cerebrovascular diseases.
The American Heart Association also published a scientific advisory in 2025 focusing on ultra-processed foods and cardiometabolic health. It concluded that high intake is consistently associated with adverse health outcomes, while emphasizing that the precise mechanisms remain unclear and that not all ultra-processed foods are necessarily equivalent.
So should every ultra-processed food be eliminated?
This is where the discussion becomes more complicated.
Saying that “all ultra-processed foods are bad” would be an oversimplification.
The NOVA classification focuses primarily on the degree and nature of processing. It does not directly measure every nutritional characteristic of a product. As a result, a product can be classified as ultra-processed while still having some potentially beneficial nutritional features.
This does not mean that ultra-processed foods are harmless overall. It means that the degree of processing should not necessarily be the only criterion used to judge a food.
A 2025 critical review highlighted this heterogeneity. Some ultra-processed products, including certain fortified cereals and dairy products, may have more favorable nutritional profiles than other products in the same broad category.
Not all industrial products are nutritionally equal
Consider two very different situations.
One person regularly consumes sugary drinks, cookies, confectionery, chips, salty ready meals and processed meat. Their overall diet may be heavily dominated by ultra-processed products.
Another person occasionally uses a packaged or fortified product because of time, cost or convenience while eating a diet largely based on vegetables, fruit, legumes, whole grains, nuts, seeds and quality protein sources.
These two dietary patterns should not be treated as identical.
The more useful question is therefore not simply “Is this food ultra-processed?” but “What role does this food play in my overall diet?”
Why replacement may matter more than prohibition
One practical strategy is to think in terms of substitution.
A European study coordinated by IARC found that replacing 10% of total daily food intake from processed and ultra-processed foods with an equal amount of unprocessed or minimally processed foods was associated with lower all-cause and cause-specific mortality. Again, this was an observational finding and does not by itself prove that the substitution directly caused the reduction in risk.
In everyday life, this could simply mean replacing a packaged snack with fruit more often, choosing water instead of a sugary drink, or choosing legumes or whole grains instead of highly refined foods.
Minimally processed foods should remain the foundation
The WHO recommends a diet based on adequacy, balance, moderation and diversity. It states that minimally processed and unprocessed foods, including fruits, vegetables, legumes and whole grains, should form the foundation of a healthy diet.
This does not mean that every food must be prepared from scratch or that every packaged product should be eliminated.
Frozen vegetables, canned vegetables without excessive sodium, some fortified foods and other convenient products can have a place in a balanced diet. Processing itself is therefore not always the problem.
The danger of an all-or-nothing approach
Trying to eliminate every ultra-processed food can also make healthy eating unnecessarily difficult.
Food is part of social life, work, travel and everyday constraints. For some people, ready-to-eat products are also convenient and sometimes more affordable.
A healthy diet therefore needs to be realistic.
Instead of pursuing perfection, it may be more useful to gradually reduce products that provide large amounts of calories, sugar, sodium or saturated fat while offering relatively little fiber and nutritional value.
How can you make better choices?
A simple approach is to look at the nutritional profile of a product first.
Comparing added sugars, sodium, saturated fat and fiber can be more informative than relying solely on whether the product is labeled ultra-processed.
Frequency also matters. A food eaten occasionally does not have the same dietary significance as a product consumed at several meals every day.
Finally, naturally nutrient-rich foods remain essential: vegetables, fruit, legumes, whole grains, nuts and seeds should regularly appear in the diet.
So, should you avoid all ultra-processed foods?
The most reasonable answer is no: there is no need to treat every ultra-processed food as forbidden.
However, current evidence provides good reasons to limit high consumption of ultra-processed products, particularly those high in sugar, sodium or saturated fat and those that displace more nutritious foods.
The real goal is not to turn eating into a list of prohibitions, but to change the overall proportions.
More whole or minimally processed foods, more fiber and dietary variety, and fewer products very high in sodium, free sugars or saturated fat is a more useful approach to healthy eating than simply following a “zero ultra-processed food” rule.
Ultimately, the question is not only whether a food has been industrially processed. It is also about what the food contains, how much is eaten, how often it is consumed and, above all, what it replaces in the diet.
