Back to News Published: 11 September 2024

Why are ultra-processed foods so bad for us?

Recent media coverage has highlighted concerns regarding Ultra-Processed Foods (UPFs). Our My Weight Matters programme has always recommended minimising these foods due to their high sugar and fat content. However, new research suggests that UPFs might be harmful to our health for additional reasons. These foods undergo industrial processes and contain substances not commonly used in home cooking or easily found in supermarkets.

The BBC Panorama programme investigated the impact of ultra-processed foods with the help of identical twins on very different diets.

How can you tell what is an UPF?

The NOVA Classification Tool categories foods based on the extent of their processing:

Unprocessed or Minimally Processed FoodsProcessed Culinary Ingredients
Processed Foods

Ultra-Processed Foods

Fresh Fruits, Vegetables, Grains, Nuts, Meat and Milk



Substances extracted from foods or nature, like oils, butter and honey


Made by adding salt, oil, sugar, or other substances to unprocessed / minimally processed foods to enhance shelf life or improve textureIndustrial formulations typically made from 5 or more ingredients in soft drinks, packaged snacks, reconstituted meat products or instant noodles
Minimal processing includes drying, crushing, roasting, boiling, freezing, pasteurisation or fermentationUsed to prepare, season and cook unprocessed or minimally processed foods

Examples are canned veg, fish, fruits in syrup, cheeses, freshly made breads

Contain additives for colouring, flavouring and emulsifying


Always take the time to look at the food labels.

try to find one healthier alternative to a UPF every time you shop

Identifying Ultra-processed foods

Always check the ingredients list on food labels – a long list will often mean its A UPF

Look for ingredients you may not recognise and not found in home cooking like emulsifiers, colours, monosodium glutamate (MSG) and butylated hydroxyanisol (bha) and guar gum

Be wary of foods marketed with ‘health halo’ such as protein bards

And ready-to-eat convenience foods that require minimal preparation are often ultra-processed

Our tips to reduce ultra-processed foods in your shop

Cook more at home because preparing meals from scratch allows you to control the ingredients and avoid unnecessary additives. it also helps with portion control.

Choose whole foods such as fresh foods over packaged and processed options

Read labels carefully which will help you make informed choices

Lastly plan your meals and snacks to help avoid the temptation of convenient, ultra-processed options.

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