Ultra-processed foods (UPFs) are rarely out of the headlines. Here's a balanced summary of where the science stands.
What counts as ultra-processed?
The NOVA classification groups foods by processing. UPFs are industrial formulations typically containing ingredients rarely used in home kitchens — such as emulsifiers, flavourings, modified starches and sweeteners. Examples include many packaged snacks, sweets, soft drinks, mass-produced bread, ready meals and processed meats.
What the research shows
Observational studies consistently link higher UPF intake with higher risks of obesity, type 2 diabetes, heart disease and early death. A tightly controlled trial found people ate around 500 kcal more per day on an ultra-processed diet than on a minimally processed diet matched for nutrients presented.
The debate
- Many UPFs are also high in fat, sugar and salt and low in fibre — so it's hard to separate "processing" from nutrient content.
- The category is broad: wholemeal supermarket bread, fortified cereals and some plant-based milks are technically UPFs but can be part of a healthy diet.
- Most evidence is observational, which cannot prove cause and effect.
Practical takeaways
- Base most meals on whole and minimally processed foods: vegetables, fruit, pulses, wholegrains, eggs, fish, meat, dairy, nuts.
- Don't panic about every additive — focus on the overall pattern.
- Cook simple meals more often; batch cooking makes it easier.
- Watch the UPFs that are easiest to overeat: crisps, sweets, biscuits, pastries and sugary drinks.