It’s official: If it’s easy to eat, it’s going to kill you
Ultra-processed foods have now been been scientifically linked to early death
Eating white bread and readymade meals could be killing us, according to the first major study linking “ultra-processed” food with early death.
The study of 45,000 middle-aged people found that every 10% increase in intake of “ultra-processed food” was linked to a 14% increased risk of death within the next eight years.
Previous research has linked consumption of foods such as white bread, ready meals, sausages, sugary cereals and fizzy drinks to a higher risk of high blood pressure and cancer.
But the new study is the first major investigation linking high consumption of processed foods to higher overall mortality rates.
The study, led by Paris-Sorbonne University, tracked the diets and subsequent mortality of 44,451 French men and women, with an average age of 57.
Participants were asked to keep 24-hour dietary records, enabling researchers to measure their intake of more than 3,000 different food items, which were classified into four groups depending on their level of processing.
Overall, “ultra-processed” foods were found to account for 29% of their diet, the study, published in JAMA Internal Medicine, found.
Such meals often have a higher content of total fat, saturated fat and added sugar and salt along with a lower fibre and vitamin density.
Author Dr Laure Schnabel, a nutritional epidemiologist at Paris-Sorbonne University, said: “Ultra-processed foods contain multiple ingredients. They are usually ready to heat and eat, affordable and hyperpalatable.
“Examples include mass-produced and packaged snacks, sugary drinks, breads, confectioneries, readymade meals and processed meats.”
Such foods can also contain additives such as sodium nitrite and titanium oxide, which have been linked to high blood pressure and cancer.
Research has also suggested artificial sweeteners present in such foods may alter gut bacteria, increasing the risk of type 2 diabetes and other metabolic diseases that are major causes of premature mortality.
Dr Schnabel said: “Nutritional characteristics of ultra-processed foods could partly explain the development of noncommunicable chronic diseases among those who consume them.
“Ultra-processed foods are generally energy-dense, rich in refined carbohydrates, saturated fats and salt, and contain low dietary fibre.
“These features have been associated with several noncommunicable diseases that are the leading causes of mortality.
“Beyond their nutritional aspects, ultra-processed foods have specific characteristics, owing to the industrial processes they undergo.
“Thus, concern is rising about the potential harmful health consequences of newly-formed contaminants or food additives.”
Dr Schnabel said: “A 10% increase in the proportion of ultra-processed food consumption was statistically significantly associated with a 14% higher risk of all-cause mortality.”
Last year a study of 19 European countries found 50% of food sold in the UK is ultra-processed compared with 46% in Germany, 45% in Ireland – and 14% in France.
Dr Schnabel and colleagues also took into consideration other risk factors such as age, gender, lifestyle, physical activity and BMI (body mass index).
She said: “Ultra-processed foods are mostly consumed in the form of snacks, desserts or ready-to-eat-or-heat meals.”
During seven years of follow-up 602 (1.4%) of the participants died – with 219 caused by cancer and 34 by cardiovascular disease.
Prof Nita Forouhi, from the Medical Research Council Epidemiology Unit at the University of Cambridge, said: “The case against highly processed foods is mounting up, with this study adding importantly to a growing body of evidence on the health harms of ultra-processed foods.”
She said more evidence was needed to confirm the findings, which came from an observational study, but stressed: “We would ignore these findings at public health’s peril.”
Dr Ian Johnson, a nutrition researcher at Quadram Institute Bioscience, said the findings were statistically significant. But he said the observational study could not prove the increased mortality rates were caused by the intake of processed foods and to fully separate out other lifestyle factors such as exercise or smoking.
Prof Kevin McConway, emeritus professor of applied statistics at The Open University, said: “It's important to understand that the differences in death rates in this study were not very large. “On average, participants were followed up for an average of about seven years, which isn’t very long in terms of picking up deaths from the sort of chronic diseases most likely to be affected by diet. Out of every 1,000 participants (all aged at least 45), about 14 died during the follow-up period,” he said.
– © The Daily Telegraph