What is Ultra-Processed Food (UPF)?
Ultra-processed foods are made with extra ingredients that your body doesn’t need. They often look like normal food, but they’ve been changed a lot from how they started.
They include things like emulsifiers, colourings, sweeteners, and flavour enhancers — ingredients that help food last longer, taste stronger, or feel nicer to eat.
But they don’t offer much real nutrition, and they’re often designed so you keep eating.
You can’t make these foods in your kitchen. They’re created using industrial processes and ingredients you wouldn’t normally use at home.
A good rule of thumb is to check the ingredients list and ask yourself: Could I make this in a well-stocked home kitchen? If the answer is yes, it’s probably not ultra-processed.
There isn’t a strict definition of ultra-processed food, and researchers are still exploring whether the harm comes from the processing itself — or simply because these foods tend to be high in sugar, fat, and calories, and low in real nutrition.
Having the occasional bit of UPF is unlikely to be harmful, however diets high in ultra-processed foods have been linked to obesity, poor gut health, and higher risk of long-term illness (such as diabetes, high blood pressure, cardiovascular disease, cancers). These risks seem to grow with the proportion of UPF in the diet — it’s not one chocolate bar, but a pattern of eating most meals and snacks from industrial sources.
👉 Important to know: Some foods do have added nutrients — not to ultra-process them, but to support public health. For example, in the UK, nutrients like iron, calcium, and B vitamins must be added to certain types of flour by law. This is called fortification, and it’s done to prevent nutrient deficiencies — not to change how the food tastes or behaves.
In the UK, certain nutrients must be added to white and brown flour by law. This has been done since the 1940s to help prevent nutrient deficiencies.
When flour is milled, some natural vitamins and minerals are lost. So four key nutrients are added back in:
- Iron
- Calcium
- Thiamine (Vitamin B1)
- Niacin (Vitamin B3)
You might also see added folic acid or vitamin D in cereals, milk, or baby food — again, to support public health, not to ultra-process the product.
🧠 The key difference? Fortification is about adding nutrition. Ultra-processing is about making food last longer, taste more intense, or be more addictive — often at the expense of real nutrients.