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Highly processed foods, such as frozen meals or some boxed products, generally have the least amount of healthy ingredients and are higher in calories, fat, salt, and added sugars.

You’ve probably heard that it’s best to reduce your intake of “highly processed foods” to live your healthiest life.

While this is true, many people are confused about what makes a food or beverage “highly processed” and why eating too many of these items may cause problems.

This article explains the differences between healthy foods and highly processed foods and why it’s best to consume highly processed foods only occasionally.

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What are highly processed foods?

Nearly all foods are processed, at least to some extent. For example, manufacturers process dried beans to make them shelf-stable. This does not make them less healthy.

So, before we get into what makes a food highly processed, it’s important to understand that foods aren’t “unhealthy” just because they’re processed in some way.

To make it easier to understand food processing, researchers have separated foods into four categories based on the extent of processing.

To do this, they used NOVA, a food classification system developed by researchers at the University of Sao Paulo, Brazil (1, 2, 3):

• NOVA Group 1. Minimally processed and unprocessed foods. Vegetables, fruits, grains, beans, and nuts fall into this category. These foods may have gone through roasting, boiling, or pasteurization to increase shelf life or make them safe to eat.
• NOVA Group 2. Processed culinary ingredients obtained directly from group 1 foods or from nature. This can include foods such as olive oil, maple syrup, and salt. Group 2 foods are mainly used in preparation and cooking of group 1 foods.
• NOVA Group 3. Processed foods, including items made by adding ingredients like salt, sugar, or other substances from group 2 to group 1 foods. Examples include fresh bread, fruits in syrup, and cheese.
• NOVA Group 4. Ultra-processed foods. These contain little, if any, of the foods or ingredients from group 1. These items are meant to be convenient, hyper-palatable, and low cost and are typically high in sugars, refined grains, fats, preservatives, and salt.

Ultra-processed, or highly processed, foods typically contain substances you wouldn’t use in food preparation at home, such as (4):

• hydrolyzed proteins
• modified starches
• hydrogenated oils
• colorants
• flavorings
• high fructose corn syrup
• artificial sweeteners
• bulking agents

These definitions aren’t perfect or 100% accurate for classifying foods, and experts admit that there’s considerable variability when it comes to listing foods as “highly processed” in research studies (4).

For example, breakfast cereals are considered highly processed in many studies. However, healthcare experts do not consider some cereals highly processed if they contain no added sugar and have undergone minimal processing.

That said, this classification system is simply meant to provide a general idea of what makes a food highly processed based on its manufacturing and ingredients.

Examples of highly processed foods

Now that you have a general idea of what makes a food highly processed, you’re probably wondering which foods and beverages fall into this category.

Here are some common examples of ultra-processed foods (2):

• sugary beverages such as carbonated soft drinks, sugary coffee drinks, energy drinks, and fruit punch
• sweet or savory packaged snacks such as chips and cookies
• sweetened breakfast cereals such as Froot Loops, Trix, Cinnamon Toast Crunch, and sweetened oatmeals
• baking mixes such as stuffing, cake, brownie, and cookie mixes
• reconstituted meat products such as hot dogs and fish sticks
• frozen meals such as pizza and TV dinners
• powdered and packaged instant soups
• candies and other confectionery
• packaged breads and buns
• energy and protein bars and shakes
• meal replacement shakes and powders meant for weight loss
• boxed pasta products
• ice cream, sweetened yogurt, and cocoa mixes
• margarine and other ultra-processed spreads such as sweetened cream cheese

Keep in mind that this list is not exhaustive. Many other foods and ingredients are also considered ultra-processed.

It’s not always immediately clear whether a food is highly processed, which could make it difficult for consumers to minimize these products in their diet.

The most reliable way to identify highly processed foods is to read the ingredient labels.

Ultra-processed foods have ingredients like (2):

• artificial colorings and flavorings
• thickeners and preservatives
• hydrolyzed proteins
• sweeteners such as fructose, high fructose corn syrup, invert sugar, and maltodextrin
• hydrogenated or interesterified oils
• bulking, foaming, and gelling agents
• flavor enhancers such as monosodium glutamate (MSG)

The world of food additives can be overwhelming and confusing, and you might find it difficult to identify everything on ingredient lists.

If you’re interested in learning more about food additives and which additives manufacturers commonly include in ultra-processed foods, check out the United Nations Codex Alimentarius, which keeps an updated list of food additives.

Summary

Highly processed, or ultra-processed, foods contain few or no minimally processed or unprocessed ingredients and tend to be higher in calories, salt, fat, and added sugars. Plus, they contain additives such as flavor enhancers and thickeners.

What are considered healthy foods?

In general, fresh vegetables, fruits, pasteurized milk, chicken, fish, beans, and eggs are considered unprocessed or minimally processed (2).

This is because these foods go through no or minimal processing before you buy them or harvest them yourself.

We commonly refer to these foods as “whole foods” because they are in their original, whole form or very close to it.

Here are some examples of healthy, whole foods:

• vegetables and fruits, including fresh, frozen, or unsweetened dried produce
• grains such as brown rice, quinoa, and buckwheat
• legumes such as beans and lentils
• starchy root vegetables such as potatoes, cassava, and sweet potatoes
• meat, poultry, eggs, and fish
• fresh or pasteurized milk and plain yogurt
• 100% fruit or vegetable juice
• herbs and spices
• tea and coffee
• nuts and seeds

Items made from whole foods — such as granola made with oats, dried fruit, and no added sugar, or polenta made with whole cornmeal — are also considered minimally processed and therefore “healthy.”

Additionally, some oils, such as olive oil and avocado oil, are derived from whole foods and are considered a healthy choice.

Using the term “healthy” can be problematic at times because it can demonize foods that are considered processed.

That’s why, rather than use the word “healthy” to describe a food, it’s better to use the term “nutrient-dense.” This refers to foods that pack a lot of nutrients per gram.

In general, minimally processed and unprocessed foods are much more nutrient-dense than ultra-processed foods.

For example, a homemade soup made with chicken, vegetables, brown rice, and broth is likely much more nutritious than a highly processed canned or boxed soup mix.

However, this doesn’t mean you have to completely avoid processed and highly processed foods. It just means that most of your diet should be composed of whole, nutrient-dense foods.

Summary

Whole, nutrient-dense foods are unprocessed or minimally processed. Fruits, vegetables, nuts, beans, fish, and eggs are just a few examples.

Main differences 

There are several differences between minimally processed foods and highly processed foods. Here are some of the main ones.

Calories

In general, ultra-processed foods tend to be much higher in calories than whole, minimally processed foods (5).

For example, a 100-gram serving of potato chips contains 545 calories, while the same size serving of a plain baked potato contains only 95 calories. This is because of the processing potato chips undergo, including frying (6, 7).

However, this isn’t always the case. Some highly processed foods — such as those produced by companies marketing to people who want to lose weight — may be low in calories. But this doesn’t automatically make them a healthy choice.

When you’re assessing whether a food is healthy, consider its entire nutritional value, not just its calorie count.

Sugar content

Sweet ultra-processed foods tend to be high in added sugars.

Ultra-processed foods such as sweetened breakfast cereals, packaged baked goods, and sweetened beverages are designed to be hyper-palatable. Manufacturers achieve this by adding sweeteners such as cane sugar, invert syrup, and high fructose corn syrup.

Unfortunately, many highly processed, sweetened products are marketed toward children and adolescents.

For example, Cap’n Crunch’s Crunch Berries, a popular cereal among children, contains a whopping 16 grams of added sugar per 1-cup (37-gram) serving. This equates to around 4 teaspoons of added sugar (8).

In contrast, a breakfast of cooked rolled oats with fresh berries and natural peanut butter contains zero grams of added sugar and is a much more nutritious choice for adults or growing children.

Likewise, energy drinks, fruit punch, and soda, which are popular among children and adults alike, can contain a shocking amount of sugar. An 8.4-ounce (248-mL) can of the energy drink Red Bull contains 26.6 grams, or 6.24 teaspoons, of sugar (9).

Other differences

Ultra-processed foods are commonly lower in fiber, protein, vitamins, and minerals and higher in salt and fat than whole, nutritious foods.

However, again, this isn’t always the case.

Some ultra-processed foods and drinks can contain added fibers and protein concentrates, which increase the products’ content of these nutrients. For example, weight loss meal replacement bars and energy bars can be very high in protein and fiber.

Additionally, some highly processed foods marketed as “diet,” “lite,” or “low fat” can be very low in fat, but this doesn’t necessarily mean these products are “healthy.”

When food manufacturers remove fat from a product, they commonly add sugar to improve the taste. Plus, many ultra-processed foods, such as diet protein bars and snacks, are high in additives such as artificial sweeteners, colors, flavors, thickeners, and more.

Summary

Ultra-processed foods tend to be higher in calories, added sugar, and salt. Plus, they commonly contain ingredients such as flavor enhancers, preservatives, and artificial colors and flavors.

Should you avoid highly processed foods?  

You don’t have to completely avoid highly processed foods to have a healthy diet overall.

Food is one of life’s main sources of enjoyment. It’s an important part of our social lives and our happiness.

It’s perfectly healthy to enjoy your favorite snack food or ice cream once in a while, as long as you consume these foods in moderation and mostly eat whole, minimally processed foods.

This is important because frequently consuming ultra-processed foods and beverages is likely to harm overall health and increase disease risk.

Time and again, research shows that those who follow diets rich in whole, nutrient-dense foods live longer and have a lower risk of developing chronic health conditions than people who consume diets high in ultra-processed foods.

For example, the Mediterranean dietary pattern is associated with a longer life expectancy and a lower risk of heart disease, diabetes, colon cancer, breast cancer, and obesity. This diet prioritizes whole foods, including (10, 11, 12, 13, 14, 15, 16):

• vegetables
• legumes
• fruits
• fish

On the other hand, diets high in ultra-processed foods such as fast food, sweets, and soda have been consistently linked to increased disease risk and a shorter life expectancy (17, 18, 19).

Thus, when it comes to health outcomes, moderating your intake of highly processed foods is key.

Summary

To keep yourself healthy and reduce your risk of disease, it’s best to follow a dietary pattern that consists mainly of whole, nutrient-dense foods. However, you can still enjoy your favorite highly processed foods occasionally.

The bottom line

There are major differences between highly processed foods and minimally processed or unprocessed foods.

Highly processed, or ultra-processed, foods contain few or no minimally processed or unprocessed ingredients and tend to be higher in calories, salt, fat, and added sugars. Plus, they often contain additives such as flavor enhancers and thickeners.

A healthy, nutrient-dense diet should be low in ultra-processed foods, but that doesn’t mean you have to avoid processed foods completely.

It’s entirely possible to maintain a balanced, healthy diet that consists mostly of whole foods while enjoying your favorite snack foods, candies, and other highly processed foods on occasion.

Just one thing

If your diet is currently high in ultra-processed foods and you want to cut back, start by focusing on one goal. For example, if you’re currently eating fast food 5 days a week, try making a goal of cutting back to one or two fast food meals a week.

Once you’ve achieved that, choose another goal, such as reaching for an unsweetened drink instead of sugar-sweetened soda. Before you know it, you’ll have significantly reduced your intake of ultra-processed foods.