Are ultra-processed foods a public health hazard?
Observational reviews and the Lancet series report strong harm links, while the RCT systematic review found no significant effects for most outcomes and the Dietary Guidelines committee judged evidence too limited.
Short answer: Yes, the evidence increasingly indicates ultra-processed foods (UPFs) are a significant public health hazard — though there remain some nuances and debates about mechanisms and universality.
The evidence base is large and consistent
Dozens of observational studies have converged on the same conclusion. Dozens of scientific studies have found links between the consumption of foods often considered ultra-processed with numerous adverse health outcomes, including cardiovascular disease, Type 2 diabetes, cancer, obesity and neurological disorders.
A major 2024 umbrella review reinforced this: a 2024 review of 45 metanalyses, covering nearly 10 million study participants, found "convincing" evidence that a diet high in ultra-processed foods increases the risk of death from cardiovascular disease by 50% and the risk of anxiety by 48%. It also found "highly suggestive" evidence that greater consumption of these foods increases the risk of death from heart disease by 66%, the risk of obesity by 55%, sleep disorders by 41%, Type 2 diabetes by 40%, early death from any cause by 21% and depression by 20%.
A 2025 global study found a dose-response relationship: each 10% increase in ultra-processed food intake increases the risk of early death by 3% (between the ages of 30 and 69). Extrapolated to the U.S., that translates to roughly 124,000 Americans dying prematurely every two years due to ultra-processed food consumption.
2025 marked a scientific "turning point"
This year brought new mechanistic and experimental support beyond correlational data. Growing evidence has linked ultra-processed food consumption to chronic disease risk, and in 2025, this field reached a turning point, with experimental, clinical and epidemiological studies converging to elucidate the underlying mechanisms at play. Notably, a 2025 randomized controlled trial has shown the harmful effects of UPFs on weight gain and metabolic and reproductive health, regardless of excessive caloric intake.
Researchers are also probing why UPFs may be harmful beyond just calories/sugar/fat content — food additives are a suspect. In an experimental study on mice, two widely consumed food additive emulsifiers caused transgenerational microbiota alteration that led to increased long-term susceptibility to metabolic and inflammatory diseases.
A landmark 2025 Lancet series called for urgent action
A major three-part series in The Lancet (late 2025) synthesized the field and explicitly framed UPFs as a public health emergency. This major three paper Series finds that ultra-processed foods are rapidly replacing fresh and minimally processed meals around the world, and links rising UPF intake to poorer diet quality and higher risks of multiple chronic diseases; the authors explain that although more research on UPFs will continue to be valuable, the current science is already strong enough to justify immediate public health action. A systematic review underpinning the series was striking in scope: a systematic review of 104 long-term studies found that 92 showed higher risks for at least one chronic disease, with meta-analyses identifying significant associations with 12 health conditions including obesity, type 2 diabetes, cardiovascular disease, depression, and premature death.
Importantly, the series framed this as more than an individual dietary choice issue: the Series stresses that improving diets cannot fall solely on individual behavior — real progress requires coordinated policies that limit UPF production, marketing, and availability, while also addressing high levels of fat, sugar and salt in the food supply and expanding access to healthy food. The authors also linked this to corporate incentives: the authors describe UPFs as products of an industrial food system built around corporate profit rather than nutrition or sustainability.
Regulators are responding
Governments have taken note. In July 2025, under the leadership of HHS and USDA, the FDA and USDA announced they are accelerating federal efforts to address the growing concerns around ultra-processed foods and the current epidemic of diet-related chronic disease, including a joint Request for Information to help establish a federally recognized uniform definition for ultra-processed foods.
The American Heart Association issued a science advisory in August 2025 as well, though it struck a more cautious tone, calling for more research to uncover how UPFs specifically impact the body, refining dietary guidance to discourage excessive consumption of nutrient-poor UPFs, clarifying the impact of the limited number of UPFs with more favorable nutrition profiles, more research on the health impacts of food additives and evidence-based policies to evaluate and regulate food additives.
Important caveats — the debate isn't fully settled
Not all evidence is airtight, and scientists acknowledge real gaps:
Bottom line
The weight of evidence — spanning large-scale observational cohorts, umbrella reviews, mechanistic/animal studies, and now some randomized trials — strongly suggests that high UPF consumption is associated with, and in some cases likely causally contributes to, increased risks of obesity, type 2 diabetes, cardiovascular disease, certain cancers, depression/anxiety, and premature death. The 2025 Lancet series and coordinated regulatory action (FDA/USDA, AHA) reflect a growing scientific and policy consensus that this constitutes a genuine public health hazard warranting action — even as researchers continue to refine which components of UPFs (additives, texture, nutrient profile, or ultra-processing itself) drive the harm, and how strong the causal (versus correlational) evidence truly is.
Citations (19)
- HHS, FDA and USDA Address the Health Risks of Ultra-Processed Foods | USDA
Source excerpt: “Dozens of scientific studies have found links between the consumption of foods often considered ultra-processed with numerous adverse health outcomes,...”
evidence, official document, points to yes. Claim: Dozens of studies link ultra-processed food consumption with adverse outcomes including cardiovascular disease, diabetes, cancer, obesity and neurological disorders.
- Ultra-processed food: Five things to know - Stanford Medicine
Source excerpt: “A 2024 review of 45 metanalyses, covering nearly 10 million study participants, found “convincing” evidence that a diet high in ultra-processed foods ...”
statistic, article, points to yes. Claim: A 2024 review of 45 meta-analyses found convincing evidence that high UPF diets raise cardiovascular death risk by 50% and anxiety by 48%.
- Ultra-processed food: Five things to know - Stanford Medicine
Source excerpt: “It found “highly suggestive” evidence that greater consumption of these foods increases the risk of death from heart disease by 66%, the risk of obesi...”
statistic, article, points to yes. Claim: Highly suggestive evidence links UPFs to heart disease death, obesity, sleep disorders, type 2 diabetes, early death and depression.
- ultra processed foods 5 findings from new study
Source excerpt: “Each 10% increase in ultra-processed food intake increases the risk of early death by 3%. ("Early death" means between the ages of 30 and 69.) ”
statistic, article, points to yes. Claim: Each 10% increase in UPF intake raises early death risk by 3% between ages 30 and 69.
- ultra processed foods 5 findings from new study
Source excerpt: “Potentially 124,000 Americans die prematurely every two years due to ultra-processed food consumption.”
statistic, article, points to yes. Claim: Roughly 124,000 Americans die prematurely every two years due to UPF consumption.
- Health effects of ultra-processed food: uncovering causal mechanisms | Nature Reviews Endocrinology
Source excerpt: “Growing evidence has linked ultra-processed food consumption to chronic disease risk. In 2025, this field reached a turning point, with experimental, ...”
evidence, article, points to yes. Claim: In 2025 experimental, clinical and epidemiological studies converged on mechanisms linking UPFs to chronic disease, a scientific turning point.
- Health effects of ultra-processed food: uncovering causal mechanisms | Nature Reviews Endocrinology
Source excerpt: “A 2025 randomized controlled trial has shown the harmful effects of UPFs on weight gain and metabolic and reproductive health, regardless of excessive...”
evidence, article, points to yes. Claim: A 2025 randomized controlled trial showed harmful effects of UPFs on weight gain and metabolic and reproductive health regardless of calories.
- Health effects of ultra-processed food: uncovering causal mechanisms | Nature Reviews Endocrinology
Source excerpt: “In an experimental study on mice, two widely consumed food additive emulsifiers caused transgenerational microbiota alteration that led to increased l...”
evidence, article, points to yes. Claim: Mouse study: two common emulsifiers caused transgenerational microbiota changes and increased susceptibility to metabolic and inflammatory disease.
- Global surge in ultra-processed foods sparks urgent health warning | ScienceDaily
Source excerpt: “The authors explain that although more research on UPFs will continue to be valuable, the current science is already strong enough to ... A major thr...”
attribution, article, points to yes. Claim: Lancet series authors say current science is already strong enough to justify immediate public health action on UPFs.
- Global surge in ultra-processed foods sparks urgent health warning | ScienceDaily
Source excerpt: “A systematic review of 104 long-term studies found that 92 showed higher risks for at least one chronic disease, with meta-analyses identifying signif...”
statistic, article, points to yes. Claim: A systematic review of 104 long-term studies found 92 showed higher risk of at least one chronic disease.
- Global surge in ultra-processed foods sparks urgent health warning | ScienceDaily
Source excerpt: “The Series stresses that improving diets cannot fall solely on individual behavior. Real progress requires coordinated policies that limit UPF produ...”
attribution, article, points to yes. Claim: The series says improving diets requires coordinated policies limiting UPF production, marketing and availability, not just individual behavior.
- Global surge in ultra-processed foods sparks urgent health warning | ScienceDaily
Source excerpt: “The authors describe UPFs as products of an industrial food system built around corporate profit rather than nutrition or sustainability. ”
attribution, article, points to yes. Claim: Authors describe UPFs as products of an industrial food system built around corporate profit.
- HHS, FDA and USDA Address the Health Risks of Ultra-Processed Foods | USDA
Source excerpt: “(Washington, D.C., July 23, 2025) – Under the leadership of the U.S. Department of Health and Human Services Secretary Robert F. Kennedy, Jr. and the ...”
evidence, official document, points to yes. Claim: In July 2025 FDA and USDA announced accelerated efforts on UPFs, including a request for information to define them.
- Excessive ultraprocessed foods (UPFs) and poor nutrition tied to poor health | American Heart Association
Source excerpt: “Experts recommend multilevel strategies, including more research to uncover how UPFs specifically impact the body, refining dietary guidance to discou...”
attribution, article, neutral. Claim: The AHA advisory took a cautious tone, calling for more research, refined dietary guidance and additive regulation.
- Global surge in ultra-processed foods sparks urgent health warning | ScienceDaily
Source excerpt: “While the authors acknowledge scientific debates about Nova and UPF definitions -- including the need for more long-term trials, clearer mechanisms, a...”
attribution, article, neutral. Claim: Authors acknowledge debates about Nova and UPF definitions but say research should not delay public health action.
- Ultra-processed foods consumption and health-related outcomes: a systematic review of randomized controlled trials
Source excerpt: “**Results:** Three educational intervention studies and one controlled feeding trial were included, evaluating the effect of reducing the consumption...”
evidence, article, points to no. Claim: A 2024 systematic review of RCTs found no significant effects in 30 of 42 outcomes evaluated.
- Ultra-processed foods consumption and health-related outcomes: a systematic review of randomized controlled trials
Source excerpt: “The controlled feeding trial in adults with stable weight showed a reduction in energy intake, carbohydrates, and fat (low certainty of evidence), as ...”
evidence, article, neutral. Claim: The controlled feeding trial showed reduced energy intake and body weight, mostly with low to moderate certainty evidence.
- Ultra-Processed Foods and Human Health: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
Source excerpt: “Statement of SignificanceConsumption of ultra-processed foods (UPF) has been shown to negatively impact human health with long-term effects on cardiom...”
evidence, article, neutral. Claim: A cohort meta-analysis cautioned that the meta-evidence is of low quality and risk varies with the assessment methodology.
- Ultra-processed foods and cardiometabolic risk: from evidence to policy | npj Metabolic Health and Disease
Source excerpt: “While 2025–2030 Dietary Guidelines Advisory Committee initially judged UPF evidence too limited for formal recommendations given definitional and expo...”
evidence, article, points to no. Claim: The 2025–2030 Dietary Guidelines Advisory Committee initially judged UPF evidence too limited for formal recommendations.