What are they: The Associated Press reported this about ultraprocessed foods: “Most foods are processed, whether it’s by freezing, grinding, fermentation, pasteurization, or other means. In 2009, Brazilian epidemiologist Carlos Monteiro and colleagues first proposed a system that classifies foods according to the amount of processing they undergo, not by nutrient content. At the top of the four-tier scale are foods created through industrial processes and with ingredients such as additives, colors, and preservatives that you couldn’t duplicate in a home kitchen, said Kevin Hall, a researcher who focuses on metabolism and diet at the National Institutes of Health. ‘These are most, but not all, of the packaged foods you see,’ Hall said.”
Why do they abound: Ultraprocessed foods “are often made to be both cheap and irresistibly delicious,” Dr. Neena Prasad, director of the Bloomberg Philanthropies’ Food Policy Program, told the AP. The doctor added that “such foods are often made to be both cheap and irresistibly delicious.” She noted that ultraprocessed foods “have just the right combination of sugar, salt and fat and you just can’t stop eating them.” The news service reported that “most Americans don’t go a day — or often a single meal — without eating [such] foods. From sugary cereals at breakfast to frozen pizzas at dinner, plus in-between snacks of potato chips, sodas, and ice cream, ultraprocessed foods make up about 60% of the U.S. diet. For kids and teens, it’s even higher – about two-thirds of what they eat.”
What are their health risks: Yale Medicine has posted online an article about the increasing research with worrisome findings, reporting: “A review, published in the British Medical Journal (BMJ) in 2024, looked at 45 studies involving almost 10 million participants. The review authors suggest that eating more ultraprocessed foods is linked to a higher risk of dying from any cause and has ties to 32 health conditions, including heart disease, mental health disorders, type 2 diabetes, and other problems.” The AP reported that nutrition studies are notoriously difficult, relying on observation and study subjects’ self-reporting on their diet and habits. “[M]ost research so far has found connections, not proof, regarding the health consequences of these foods,” the AP reported. “Food manufacturers argue that processing boosts food safety and supplies and offers a cheap, convenient way to provide a diverse and nutritious diet.”
With caveats noted, the Yale Medicine article reported this: “While it is hard to definitively say how and why ultraprocessed foods can lead to health problems, the BMJ researchers have theories. For example, in the review, researchers say ultraprocessed foods might replace more nutritious meal options, including fresh fruits and vegetables. A diet composed mainly of ultraprocessed foods also exposes people to unhealthy additives and increases the risk of chronic inflammatory diseases, they add. ‘A growing body of data shows instances of exposure to combinations of multiple additives, which may have potential “cocktail effects” with greater implications for human health than exposure to a single additive,’ the review authors say. ‘Finally, ultraprocessed foods can contain contaminants with health implications that migrate from packaging materials, such as bisphenols, microplastics, mineral oils, and phthalates.’”
What consumers can do now: The New York Times reported that the health savvy can try to skip ultraprocessed foods, choosing “to swap flavored yogurt for plain yogurt with fruit, for example, or to buy a fresh loaf from a local bakery instead of packaged bread, if you can afford to do so.” The newspaper, noting the huge prevalence of ultraprocessed items in U.S. diets, said a “more moderate strategy” also is an option, “focusing on limiting [ultraprocessed foods] that don’t provide valuable nutrients, like soda and cookies.” Experts also have “recommended eating more fruits, vegetables, whole grains (ultraprocessed or not), legumes, nuts, and seeds. Cook at home as much as you can, using minimally processed foods.”
An online article from Harvard Health concurs, reporting these ideas: Avoid processed foods, which can include chips and other snack foods, industrial breads and pastries, packaged sweets and candy, sugar-sweetened and diet sodas, instant noodles and soups, ready-to-eat meals and frozen dinners, and processed meats such as hot dogs and bologna. Eat unprocessed or minimally processed foods, which — when combined with a healthy Mediterranean menu of foods — include fish, olive oil, avocados, whole fruits and vegetables, nuts and beans, and whole grains.”