Consumption of ultra-processed foods (UPF) has been linked to severe health consequences, but some researchers are now suggesting that studies on UPFs are not taking into account differences in processing and ingredients of certain subgroups. Avoiding UPFs like deli meats, sugary drinks, and salty snacks is more important than trying to avoid all processed foods. Different groups of UPFs evaluated in studies often show different associations with health outcomes. The statistical analyses may be based on questionable assumptions, leading to potentially misleading results.
Melanie Murphy Richter, a registered dietitian nutritionist, emphasized that not all processed foods are unhealthy and that distinctions need to be made. Some UPFs can have neutral or even beneficial health effects, while others are linked to chronic diseases. The issue is not the processing itself, but rather how it is processed and the type of ingredients used. Mir Ali, a board-certified bariatric surgeon, also highlighted the difficulty in assessing the direct effects of UPFs due to their broad category.
The NOVA system classifies UPFs as industrial creations made mostly from substances derived from natural foods, with added coloring and flavor enhancers. Sugary beverages, salty snacks, and UPFs with trans fats and hydrogenated oils should ideally be avoided due to their negative impact on health. Sugary beverages can lead to insulin surges and weight gain, while snacks with hydrogenated oils and trans fats can increase cholesterol levels and the risk of heart disease. Processed meats like hot dogs and deli meats are classified as Group 1 carcinogens and can contribute to hypertension and cardiovascular disease.
The paper’s authors stress that not all UPFs are the same, as different subgroups contain different ingredients. Not all ultraprocessing is necessarily harmful, and the recommendation to avoid all UPFs based on the NOVA classification may be scientifically weak. Richter notes that some UPFs like whole-grain products, canned fruits and vegetables, and dairy products can have health benefits. Maintaining a balance between minimally processed foods and fresh fruits and vegetables is important for overall health.
Ali suggests that consuming minimally processed foods and cooking at home can help reduce the intake of UPFs. While affordability and convenience are factors, prioritizing minimally processed foods can lead to a healthier diet. By combining choices of minimally processed foods with fresh options, it is possible to maintain a healthy diet within financial and accessibility limitations. The key is to be mindful of the processing and ingredients in foods consumed and to make informed choices for better health.
