Ultra-processed foods, called UPFs, are factory-made products that use additives such as emulsifiers, colorings, and flavorings to improve taste, texture, and shelf life. Examples include instant noodles, soft drinks, packaged snacks, and most commercial ice cream. The NOVA system, a food classification created in 2009, places UPFs in the highest processing group. This system sorts foods by how much they are processed, not only by nutrients, to help people and policymakers understand what they eat.
Prof Carlos Monteiro, who helped create NOVA, argues that governments should act now. He calls for taxes on clear UPF categories, simple front-of-pack health warnings, and strict marketing limits. He says waiting will raise the burden of long-term disease in both rich and poor countries. He also supports a global pact, similar in spirit to the tobacco treaty, to reduce the supply and demand of these products and to shield public policy from industry pressure.
Monteiro’s stance is based on a growing body of research. Many large population studies link higher UPF intake with poor health, including heart disease and diabetes. A tightly controlled clinical trial also showed that people given an ultra-processed diet ate more and gained weight compared with a minimally processed diet, even when calories and nutrients on offer were matched. Together, this evidence suggests that how food is made matters for health, not only what nutrients it contains.
Policy design is central. Monteiro urges regulators to target whole product groups that are very likely UPFs rather than argue over edge cases. He suggests fast action on reconstituted meat products, instant noodles, and soft drinks. He also argues that raising the price of UPFs should be paired with support for fresh and minimally processed foods, especially in low income communities where access is limited. He rejects the idea that eating fruits and vegetables cancels out the effects of heavy UPF intake.
Countries face different starting points. In some high income nations, UPFs already make up a large share of daily calories. In many low and middle income countries, UPF intake is rising fast, with aggressive marketing to poorer groups and rapid growth of packaged, ready to eat products. Monteiro says stronger rules on labels, advertising, and tax can help slow this shift and protect public health.
The BMJ – Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses – 2024
A systematic umbrella review of meta-analyses reports consistent associations between higher UPF intake and many adverse outcomes, including cardiometabolic disease, mental health problems, and higher mortality risk. The authors call for public health measures to reduce exposure and for more mechanistic research.
Cell Metabolism – Ultra-processed diets cause excess calorie intake and weight gain: an inpatient randomized controlled trial of ad libitum food intake – 2019
In a crossover trial with controlled menus, participants ate more and gained weight on an ultra-processed diet compared with a minimally processed diet, despite matched nutrients and calories offered. This provides causal evidence that ultra-processing can drive overeating.
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