A sweeping global review of research published in The Lancet links the increasing consumption of ultra-processed foods to a heightened risk of numerous chronic diseases, from cardiovascular issues and diabetes to mental health concerns. International experts are now calling for governments to intervene with measures like warning labels and potential taxation, signaling a growing concern over the impact of modern diets. While the study identifies a strong association, researchers acknowledge the need for further clinical trials to definitively establish causation, prompting debate within the scientific community about the role of food processing in public health.
A global review of research indicates that consuming highly processed foods is linked to an increased risk of more than a dozen diseases, prompting calls for governments worldwide to implement control measures, ranging from warning labels to taxation.
November 19, 2024 – International experts are urging immediate action to reduce the consumption of ultra-processed foods (UPF), citing a growing threat to public health, according to a new report reviewing global research. This comes as dietary patterns shift worldwide, with more people relying on inexpensive, heavily processed options.
Experts note that global eating habits are changing, with a move away from fresh, whole foods towards cheaper, highly processed alternatives. This shift is associated with an increased risk of numerous chronic diseases, including obesity and depression.
Researchers, writing in the journal The Lancet, are calling on governments to take swift action, suggesting measures such as prominent warning labels on products and taxes on highly processed foods. Revenue generated from such taxes could be used to improve access to more nutritious options.
However, some scientists caution that the report doesn’t definitively prove that UPFs directly *cause* the observed health impacts, and further clinical studies are needed. This highlights the complexity of establishing direct cause-and-effect relationships in nutritional science.
What are Ultra-Processed Foods?
Ultra-processed foods (UPF) are defined as those containing more than five ingredients not typically found in a home kitchen, such as emulsifiers, preservatives, additives, colorings, and sweeteners. Examples of UPFs include sausages, potato chips, pastries and biscuits, instant noodles, sugary drinks, ice cream, and industrially produced bread.
Surveys indicate that these industrially produced foods are increasingly prevalent in diets globally, leading to a decline in food quality, higher levels of sugar and unhealthy fats, and lower levels of fiber and protein.
Review of 104 Studies Reveals Clear Risk Increases
The review, conducted by 43 experts worldwide, analyzed 104 long-term studies and found a link between UPF consumption and a higher risk of 12 different conditions, including type 2 diabetes, cardiovascular disease, kidney disease, depression, and premature death from all causes. Understanding these links is crucial for informing public health strategies.
“The increasing consumption of UPF is reshaping global dietary patterns and leading people to consume less fresh food,” said Professor Carlos Monteiro from the University of São Paulo, who developed the NOVA food classification system. “Global food industry companies are making huge profits by pushing heavily processed products, and using marketing and lobbying to undermine public health policies that might reduce their consumption.”
Dr. Philip Baker, a co-author of the report from the University of Sydney, stated, “The world needs a robust global public health response, similar to the efforts to address the tobacco industry.”
While the report acknowledges a lack of direct data from clinical trials, it asserts that waiting for such data before taking action is not advisable, given the potential risks to public health.
Some Researchers Question Causation
Some scientists argue that isolating the effects of UPFs from other factors, such as lifestyle, dietary patterns, and socioeconomic status, can be challenging. Critics of the NOVA system contend that it places too much emphasis on the degree of processing, without considering the nutritional value of the food itself. For example, whole-grain bread, breakfast cereals, low-fat yogurt, infant formula, and fish fingers are classified as UPFs but can still offer significant nutritional benefits.
Professor Kevin McConway from the Open University cautioned that “studies like this find associations, not causation. There is still room for doubt and a need for further research.”
Unclear What in UPFs is Harmful
Professor Jules Griffin from the University of Aberdeen pointed out that some food processing is beneficial, and urgent research is needed to understand how processing affects the body.
The Food and Drink Federation (FDF) of the UK stated that UPFs can be part of a balanced diet, such as frozen peas and wholemeal bread, and that since 2015, sugar and salt levels have been reduced by a third in many food products, in line with government guidelines.
The UK’s Scientific Advisory Committee on Nutrition (SACN) acknowledged earlier this year that the link between UPF consumption and poorer health outcomes is concerning, but it remains unclear whether this is due to the processing itself or the fact that these foods are often high in calories, saturated fat, salt, and free sugars. Current UK government advice remains to increase intake of fruits, vegetables, and fiber, and to reduce sugar, fat, and salt.
Source: www.bbc.com
