Are ultra-processed foods a public health hazard?
The industry critique (Food Drink Europe) and the cautious European bodies question NOVA and the strength of the evidence, while the Lancet, BMJ and AHA sources conclude UPFs are harmful and warrant action.
Yes, a substantial and growing body of evidence indicates that ultra-processed foods (UPFs) constitute a significant public health hazard. They are strongly associated with higher risks of obesity, type 2 diabetes, cardiovascular disease, certain cancers, mental health issues, gastrointestinal problems, and premature mortality, while displacing healthier traditional diets based on whole and minimally processed foods.[1][2][3]
What Are Ultra-Processed Foods?
UPFs are defined primarily by the NOVA classification system (developed by Brazilian researchers around 2009). They are industrial formulations made mostly from substances extracted from foods (e.g., oils, fats, sugars, starches, proteins) or synthesized in labs, combined with additives (flavors, colors, emulsifiers, preservatives) to enhance palatability, shelf life, and convenience. They typically contain little or no intact whole foods. Examples include sugary drinks, packaged snacks, instant noodles, reconstituted meats, many breakfast cereals, ready meals, and confectionery.[4][5]
This differs from unprocessed/minimally processed foods (e.g., fresh fruits, vegetables, plain meats, grains) or processed culinary ingredients (e.g., oils, sugar, salt). Processing itself is not inherently bad—many techniques improve safety and convenience—but the extent, purpose (often profit-maximizing hyper-palatability and convenience), and resulting formulations of UPFs raise concerns. In high-income countries like the US, UPFs often provide over 50–60% of adults’ calories (higher in children); consumption is rising globally, with sales reaching ~$1.9 trillion in 2023.[4][1]
Key Evidence of Health Harms
The American Heart Association’s 2025 science advisory notes consistent links to cardiometabolic risks (e.g., 25–58% higher risk of events with high vs. low intake in meta-analyses) and calls for reducing most UPFs, especially those high in saturated fat, added sugars, and sodium (HFSS).[8][9]
Nuances, Criticisms, and Limitations
Not all UPFs are equally harmful—heterogeneity exists. Some (e.g., certain whole-grain breads, plain low-sugar yogurts, or nut butters) may fit into healthier patterns better than others like sugar-sweetened beverages or processed meats (the latter classified as Group 1 carcinogens by WHO/IARC for colorectal cancer links). Focusing solely on processing can overlook nutrient quality; critics argue NOVA is sometimes imprecise, subjective, or confounded by overall diet quality, socioeconomic factors, and lifestyle.[10][11]
Most evidence is observational (GRADE ratings often low/very low due to potential residual confounding), though consistent across populations and supported by RCTs and mechanistic data. Industry-linked critiques emphasize these limitations and potential unintended consequences of broad policies (e.g., impacting affordable options or innovation). However, the Lancet authors and others argue the totality of evidence is sufficient for action and that further research should not delay it. Some European bodies have been more cautious about basing policy solely on NOVA.[3][12]
Public Health Stance and Response
Experts increasingly view the rise of UPFs as a major driver of the global non-communicable disease (NCD) burden, comparable in urgency to issues like tobacco in terms of commercial determinants. The 2025 Lancet series calls for tobacco-style policies: taxes (e.g., on sugary drinks), front-of-pack warning labels, marketing restrictions (especially to children), limits in schools/hospitals, and support for fresh/minimally processed foods.[1][13]
WHO has sounded alarms (linking UPFs to NCDs and deaths), is developing guidelines on UPF consumption, and supports related actions via salt/sugar/trans-fat initiatives. Several countries (e.g., Brazil and others in Latin America) incorporate NOVA-inspired advice into dietary guidelines (“prefer natural/minimally processed; avoid UPFs”). PAHO/FAO have used it. In the US, figures like RFK Jr. have highlighted the issue, and AHA advises minimizing most UPFs.[14][15][5]
Bottom Line and Practical Implications
The evidence supports classifying high UPF consumption as a public health hazard that contributes substantially to obesity, chronic disease, and related inequities (as UPFs are often cheap, convenient, and heavily marketed). Reducing intake—by prioritizing whole foods, cooking more from scratch where feasible, and choosing less-processed options—is advisable for individuals, alongside systemic policies to reshape food environments.
Absolute avoidance is impractical for many, and some UPFs can play limited roles, but the pattern of displacement matters most. Ongoing research will refine mechanisms, subtypes, and safe thresholds, but the consensus among many leading nutrition and public health experts is clear: action to curb UPFs is warranted now.
Citations (15)
- https://www.nytimes.com/2025/11/18/well/eat/ultraprocessed-foods-health.html
Backs: “They are strongly associated with higher risks of obesity, type 2 diabetes, cardiovascular disease, certain cancers, mental health issues, gastrointestinal problems, and premature mortality, while displacing healthier traditional diets based on whole and minimally processed foods.”
evidence, article, points to yes. Claim: UPFs are strongly associated with obesity, diabetes, cardiovascular disease, cancers, mental health problems and premature mortality; the Lancet series calls for tobacco-style policies.
- https://www.sciencedirect.com/science/article/pii/S014067362501565X
Backs: “They are strongly associated with higher risks of obesity, type 2 diabetes, cardiovascular disease, certain cancers, mental health issues, gastrointestinal problems, and premature mortality, while displacing healthier traditional diets based on whole and minimally processed foods.”
evidence, official document, points to yes. Claim: The 2025 Lancet series of 43 experts concluded UPF-dominated diets drive poorer diet quality and chronic disease, with mechanisms of harm.
- https://www.bmj.com/content/384/bmj-2023-077310.abstract
Backs: “They are strongly associated with higher risks of obesity, type 2 diabetes, cardiovascular disease, certain cancers, mental health issues, gastrointestinal problems, and premature mortality, while displacing healthier traditional diets based on whole and minimally processed foods.”
evidence, official document, points to yes. Claim: A 2024 BMJ umbrella review found UPF intake associated with 32 health parameters, though the evidence is largely observational.
- https://publichealth.jhu.edu/2025/what-are-ultra-processed-foods
Backs: “Examples include sugary drinks, packaged snacks, instant noodles, reconstituted meats, many breakfast cereals, ready meals, and confectionery.”
background, article, neutral. Claim: UPFs are defined by NOVA as industrial formulations with additives, and make up over 50-60% of calories in the US.
- https://en.wikipedia.org/wiki/Nova_classification
Backs: “Examples include sugary drinks, packaged snacks, instant noodles, reconstituted meats, many breakfast cereals, ready meals, and confectionery.”
background, reference entry, neutral. Claim: NOVA classification was developed by Brazilian researchers and is used in dietary guidelines in Brazil and elsewhere.
- https://www.truthbased.org/ultra-processed-food
Backs: “More recent trials (including real-world settings) show greater weight loss on minimally processed diets even when UPFs are nutritionally improved.”
evidence, article, points to yes. Claim: Kevin Hall's 2019 NIH crossover trial found about 500 extra kcal/day eaten on a UPF diet, with weight and fat gain.
- https://www.nytimes.com/2025/08/04/well/eat/avoiding-ultraprocessed-foods-might-double-weight-loss.html
Backs: “More recent trials (including real-world settings) show greater weight loss on minimally processed diets even when UPFs are nutritionally improved.”
evidence, article, points to yes. Claim: Recent trials show greater weight loss on minimally processed diets even when UPFs are nutritionally improved.
- https://www.sciencedaily.com/releases/2025/08/250809101005.htm
Backs: “These include poor nutrient profiles (high in energy density, free sugars, unhealthy fats, sodium; low in fiber, micronutrients, phytochemicals); drivers of overeating (hyper-palatability, soft textures enabling fast eating, disrupted food matrices reducing satiety); additives and processing byproducts (potential…”
evidence, article, points to yes. Claim: Mechanisms of UPF harm, and the AHA advisory linking UPFs to higher cardiometabolic risk.
- https://professional.heart.org/en/science-news/ultraprocessed-foods-and-their-association-with-cardiometabolic-health/top-things-to-know
Backs: “The American Heart Association’s 2025 science advisory notes consistent links to cardiometabolic risks (e.g., 25–58% higher risk of events with high vs. low intake in meta-analyses) and calls for reducing most UPFs, especially those high in saturated fat, added sugars, and sodium (HFSS).”
statistic, official document, points to yes. Claim: AHA 2025 advisory reports 25-58% higher cardiometabolic risk with high versus low UPF intake and advises reducing most UPFs.
- https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/nutrition-basics/are-ultraprocessed-foods-good-or-bad
Backs: “Focusing solely on processing can overlook nutrient quality; critics argue NOVA is sometimes imprecise, subjective, or confounded by overall diet quality, socioeconomic factors, and lifestyle.”
evidence, article, neutral. Claim: Not all UPFs are equally harmful, and NOVA can be imprecise or confounded by overall diet quality.
- https://www.vox.com/future-perfect/494045/ultra-processed-foods-science-rcts
Backs: “Focusing solely on processing can overlook nutrient quality; critics argue NOVA is sometimes imprecise, subjective, or confounded by overall diet quality, socioeconomic factors, and lifestyle.”
evidence, article, points to no. Claim: Critics argue processing-focused classification is imprecise and the science, including RCTs, has limitations.
- https://www.fooddrinkeurope.eu/wp-content/uploads/2026/07/EXTERNAL-Scientific-critique-of-UPF-classifications-June-2026.pdf
Backs: “Some European bodies have been more cautious about basing policy solely on NOVA.”
attribution, official document, points to no. Claim: Industry-linked critique emphasizes limitations of UPF classifications and the unintended consequences of broad policies.
- https://www.npr.org/2025/11/19/nx-s1-5613438/ultra-processed-foods-are-a-threat-to-public-health-scientists-say
Backs: “The 2025 Lancet series calls for tobacco-style policies: taxes (e.g., on sugary drinks), front-of-pack warning labels, marketing restrictions (especially to children), limits in schools/hospitals, and support for fresh/minimally processed foods.”
attribution, article, points to yes. Claim: Scientists in the Lancet series say UPFs are a public health threat and call for taxes, warning labels and marketing limits.
- https://x.com/DrTedros/status/1991401015929606409
Backs: “In the US, figures like RFK Jr. have highlighted the issue, and AHA advises minimizing most UPFs.”
attribution, social or video, points to yes. Claim: WHO has sounded alarms linking UPFs to noncommunicable diseases and deaths.
- https://www.foodnavigator.com/Article/2025/06/19/who-ultra-processed-food-guidance/
Backs: “In the US, figures like RFK Jr. have highlighted the issue, and AHA advises minimizing most UPFs.”
evidence, article, points to yes. Claim: WHO is developing guidelines on UPF consumption.