The ultra-processed food (UPF) industry has long been under scrutiny for its potential links to chronic diseases. A recent study published in the American Journal of Preventive Medicine has shed more light on this issue, attempting to quantify the number of deaths that could be prevented by reducing UPF consumption in Canada.
Researchers used a modelling approach to estimate that between 23% and 38% of all cardiovascular disease (CVD) cases in Canada could be avoided if UPF consumption were eliminated entirely. This translates to approximately 96,000 out of 258,550 CVD cases and 17,400 out of 46,153 CVD-related deaths annually.
However, experts have questioned the accuracy of these estimates. Dr Adam Jacobs, Executive Director and Strategic Consultant, Biostatistics, Ergomed, pointed out that a crucial assumption in the model is the estimated relative risk of CVD associated with high UPF consumption, which stands at a 29% increase. He suggested that this figure may not represent a direct causal relationship between UPF consumption and CVD risk.
A significant confounding factor identified by Dr Jacobs is socioeconomic status. Individuals from lower socioeconomic backgrounds tend to consume more UPFs and experience poorer CVD outcomes. This raises the possibility that the observed association between UPF and CVD risk might be a proxy for socioeconomic disparities rather than a direct causal effect of UPF consumption itself.
The study also explored more realistic scenarios, such as a 20% reduction in energy intake from UPFs. This was estimated to avert 16,800 new CVD cases and 3,100 deaths annually. However, Dr Jacobs cautioned that these figures are likely overestimates, given the limitations of the model.
The NHS notes that a diet rich in whole, unprocessed foods is essential for maintaining good heart health. While this study's findings may be subject to interpretation, they do highlight the importance of making informed food choices and adopting healthier eating habits to reduce the risk of CVD.