Barely a day passes without another study warning of the dangers of ultra-processed foods (UPFs). The latest linked a high intake of UPFs to a 41 per cent increased risk of lung cancer compared to those with low intakes.

UPFs are defined as anything that contains additives not found in the home and is made to an industrial formulation. These types of foods, such as processed red meats, fizzy drinks, mass-produced bread, crisps, and sweets, now make up over half of the average Brit’s diet, and up to two-thirds in adolescents.

The lung cancer study found the risk rose after just 12 years of studying the participants. UPFs have also been linked with heart disease, diabetes and other cancers. But when do the risks kick in? Does an occasional pack of biscuits counteract a veg-based diet, or

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