A recent study suggests that increased consumption of ultra-processed foods is associated with a range of health risks, including heart disease, stroke, cancer, and diabetes. The research, which compiled data from 51 long-term studies involving almost 8.9 million adults, did not establish a safe intake level for these foods, highlighting that each additional 3.5 ounces (100 grams) consumed daily elevated the risk of various health issues.
Read More
Lead author Xiao Liu from Duke-NUS Medical School in Singapore stated that the findings represent an average risk across the dataset rather than a definitive safe threshold. Those who consumed the highest amounts of ultra-processed foods faced a 31% increased risk of digestive diseases and a 24% heightened risk of cardiovascular events, including heart attacks and strokes. The study found that obesity risk rose by 23%, cancer risk by 12%, and the chance of dying from any cause increased by 18% among heavy consumers of these foods.
The researchers noted that the connection between ultra-processed food intake and health risks was more pronounced with cardiovascular diseases. Each additional 100 grams daily raised the risk of cardiovascular events by 14% and high blood pressure by 11%. Liu remarked on the significant cardiovascular risk associated with increased consumption of these foods, while acknowledging the oddity of high blood pressure risk not differentiating clearly between high and low consumers.
Ultra-processed foods, which include items like packaged snacks and sugary drinks, are often low in essential nutrients and high in additives, sugar, and salt. They accounted for over 53% of adults' caloric intake in the U.S. from 2021 to 2023. The studies reviewed spanned durations from two to 32 years, with a participant age range of about 24 to 77.
Despite the evidence of negative health impacts, Liu indicated that a specific safe consumption level remains unclear due to potential varying cutoff levels for different diseases. He recommended reducing ultra-processed food intake and opting for healthier, minimally processed options.
The study also highlighted concerns about the potentially harmful effects of chemical additives found in these processed foods. Notably, prior research has linked some of these compounds to heart disease. Liu cautioned that further research is necessary to understand the implications of these mixtures since they may interact in unpredictable ways.
Many of the studies relied on self-reported dietary data, raising concerns about accuracy, particularly regarding underreporting of unhealthy food items. The classification system for ultra-processed foods can also group together items that may have different nutritional profiles, complicating assessments of risk. As the current research lacks a breakdown of which specific products increase health risks, further studies will need to address dietary quality and identify safe consumption levels across various demographics.
The complete findings of the research were published in the journal Family Medicine and Community Health.