Processed Foods: Good or Bad? What Science Really Says

Processed foods aren’t simply black and white—good or bad. Ultra-processed foods are linked to health risks, but many processed products fit perfectly into a healthy diet. Read what the research does and doesn’t say, and learn what practical choices you can make.

You often hear it at birthday parties: processed food is bad and unprocessed food is good. It sounds logical. But it’s not that simple.

In the world of nutrition, many of the things we take for granted aren’t as well-supported as we think. That’s certainly true of the debate over processed foods.

What do we actually mean by “processed food”?

Almost everything you eat is processed in one way or another. For example:

• Milk that is pasteurized
• Fermented yogurt
• Bread that’s baked
• Vegetables that are frozen
  
  

Processing itself isn’t the problem. It’s about how extensively and why something is processed. Researchers therefore often distinguish between three groups.

Minimally processed foods

Think of frozen vegetables, oatmeal, nuts, and yogurt. The food remains largely the same as it was.

Processed foods

Think of cheese, bread, canned vegetables, and tofu. Ingredients are added or the production process is altered, but you can still recognize the food.

Ultra-processed foods

Think of soda, potato chips, cookies, ready-made meals, and energy bars with long ingredient lists. These products are manufactured in factories and often contain emulsifiers, flavor enhancers, and refined sugars.

This third group, in particular, is associated with health risks. But here, too, the picture is more nuanced than you might think.

Is ultra-processed food bad for you? Why the story is often oversimplified

We often place more trust in nutritional research than the evidence warrants. This is because many studies are:

• Observational
• Based on questionnaires about what people eat
• Difficult to replicate

So they show correlations, but they don’t prove that one causes the other.

Here’s an example. People who eat a lot of ultra-processed foods are, on average, less healthy. But is that because of the food? Or do they also exercise less, experience more stress, and sleep worse? It’s hard to tell them apart.

Weight: Why Losing Weight Is So Hard

Gaining weight has little to do with willpower. Most people who lose weight end up gaining it back later. Not because they fail, but because their bodies work against them:

• Your metabolism slows down
• You’ll experience more fluctuations in hunger hormones
• You’re less likely to feel full

Your body tries, as it were, to maintain your previous weight. That’s why it’s better to view your weight the same way you view your teeth.

The Dental Model of Health

No one expects that a single visit to the dentist is enough to ensure healthy teeth. We consider it normal that you:

• Brushing every day
• Check-up
• Undergoing maintenance treatment from time to time

It’s the same with your weight and your health. It’s not a one-time task, but something you’re constantly working on.

And what about exercise?

Exercise has many benefits:

• A healthier heart and healthier blood vessels
• Improved insulin sensitivity
• Better Mental Health
• Stronger muscles and bones

However, the media often fails to mention one important nuance. The direct effect of exercise on how long you live is sometimes overestimated. Exercise works mainly because it:

• Reduces chronic diseases
• Making Your Metabolism Healthier
• It helps ensure that you continue to function well as you get older

So exercise mainly leads to more healthy years—your healthspan—rather than directly leading to a longer life.

What does this mean for your daily diet?

If you take an honest look at the research, a more realistic picture emerges. Not every processed product is bad. And not everything that’s natural is automatically healthy. Here are a few pointers:

Above all, choose foods that you recognize as food

Vegetables, fruits, legumes, nuts, and whole grains.

Use processed foods wisely

Yogurt, tofu, whole-grain bread, and frozen vegetables.

Eat fewer ultra-processed foods

Soda, candy, and highly processed snacks.

The most important thing is still your overall eating and lifestyle habits. One bag of chips won’t make a difference.

The biggest lesson from longevity research

Research on healthy aging is still in its infancy. There are still many unanswered questions about nutrition, exercise, metabolism, and aging. If the field is to make progress, researchers must also be willing to admit, “We don’t know this for sure yet.”

Why biomarker measurements are becoming increasingly important

Precisely because general dietary advice is limited, more and more people want to assess their own health. Blood tests, for example, can provide insight into:

• Cholesterol and Your Risk of Cardiovascular Disease
• Ignition values
• Glucose and Insulin Sensitivity
• Your Vitamin and MineralStatus

More and more often, these results are linked to an AI dashboard that provides personalized advice. Through Bloedwaardentest, for example, you can order the InsideTracker Ultimate blood test. It includes many biomarkers related to your metabolism, hormones, inflammation, nutritional status, and post-workout recovery.

You can have your blood drawn at more than 1,000 locations throughout the Netherlands. If we find anything abnormal that may require immediate medical attention, a doctor or medical expert will always call you first. You can also opt for a follow-up phone consultation or a lifestyle consultation separately.

Conclusion: Less hype, more honesty

Nutrition science is constantly evolving. Not everything that’s popular is well-supported by evidence. And not everything that sounds simple is actually true.

Healthy living is less about following perfect rules and more about adopting a lifestyle you can stick to, staying on track, and knowing where you stand. Trust in science grows not through certainty, but through honesty.

Frequently Asked Questions About Processed Foods

Is all processed food unhealthy?

No. Many products, such as yogurt, cheese, and frozen vegetables, are processed but fit perfectly into a healthy diet.

What’s the difference between processed and ultra-processed foods?

Ultra-processed foods often contain manufactured ingredients, a lot of added sugar, salt, and other additives. Regular processed foods are still fairly close to the original product.

Why do people often regain weight after losing it?

When you lose weight, your body slows down your metabolism and produces more hunger hormones. This makes it difficult to maintain your new weight for a long time.

Medical disclaimer: This information is general in nature and is not intended to replace personal medical advice, diagnosis, or treatment. If you have any symptoms, receive an abnormal test result, or have any concerns, please contact your primary care physician or treating physician.

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