In the first study, researchers at the University of Paris gathered details on the diets and health of more than 105,000 people.
Over five years of follow-up, the researchers found that those who consumed the most ultra-processed food were most at risk of stroke, heart attack and other cardiovascular problems.
What’s more, every 10 per cent increase in consumption of ultra-processed food was linked to a 13 per cent rise in rates of heart disease, and an 11 per cent risk in diseases which cause strokes.
For the second study, a team at the University of Navarra in Spain monitored the eating habits and health of nearly 20,000 graduates from 1999 to 2014.
The researchers' findings showed that those eating four portions a day of highly processed foods had a 62 per cent increased mortality risk, compared with those eating less than two.
The scientists warned that people need to be more aware of what they are consuming, and should consider cutting out processed meats and convenience meals, in favour of more natural foods.
They also warned that modern lifestyles mean up to 60 per cent of daily energy intake is now coming from factory-produced foods.
Dr Mathilde Touvier, from the University of Paris, told BBC News: “The rapid and worldwide increasing consumption of ultra-processed foods, to the detriment of less processed foods, may drive a substantial burden of cardiovascular diseases in the next decades.”
“[The] evidence is accumulating. Increasing numbers of independent studies observe associations between ultra-processed foods and adverse health effects.”
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