Cited by 465Consumer Attitudes and Food LabelingNutritional Studies and DietDiet, Metabolism, and Disease

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Ultraprocessed Food Consumption and Risk of Type 2 Diabetes Among Participants of the NutriNet-Santé Prospective Cohort

Open access
Srour, Bernard, Fezeu, Léopold K., Kesse-Guyot, Emmanuelle, Allès, Benjamin, Debras, Charlotte, Druesne-Pecollo, Nathalie, Chazelas, Eloi, Deschasaux, Mélanie, Hercberg, Serge, Galan, Pilar, Monteiro, Carlos A., Julia, Chantal, Touvier, Mathilde·2020·JAMA Internal Medicine

Abstract

Importance: Ultraprocessed foods (UPF) are widespread in Western diets. Their consumption has been associated in recent prospective studies with increased risks of all-cause mortality and chronic diseases such as cancer, cardiovascular diseases, hypertension, and dyslipidemia; however, data regarding diabetes are lacking. Objective: To assess the associations between consumption of UPF and risk of type 2 diabetes (T2D). Design, Setting, and Participants: In this population-based prospective cohort study, 104 707 participants aged 18 years or older from the French NutriNet-Santé cohort (2009-2019) were included. Dietary intake data were collected using repeated 24-hour dietary records (5.7 per participant on average), designed to register participants' usual consumption for more than 3500 different food items. These were categorized according to their degree of processing by the NOVA classification system. Main Outcomes and Measures: Associations between UPF consumption and risk of T2D were assessed using cause-specific multivariable Cox proportional hazard models adjusted for known risk factors (sociodemographic, anthropometric, lifestyle, medical history, and nutritional factors). Results: A total of 104 707 participants (21 800 [20.8%] men and 82 907 [79.2%] women) were included. Mean (SD) baseline age of participants was 42.7 (14.5) years. Absolute T2D rates in the lowest and highest UPF consumers were 113 and 166 per 100 000 person-years, respectively. Consumption of UPF was associated with a higher risk of T2D (multi-adjusted hazard ratio [HR] for an absolute increment of 10 in the percentage of UPF in the diet, 1.15; 95% CI, 1.06-1.25; median follow-up, 6.0 years; 582 252 person-years; 821 incident cases). These results remained statistically significant after adjustment for several markers of the nutritional quality of the diet, for other metabolic comorbidities (HR, 1.13; 95% CI, 1.03-1.23), and for weight change (HR, 1.13; 95% CI, 1.01-1.27). The absolute amount of UPF consumption (grams per day) was consistently associated with T2D risk, even when adjusting for unprocessed or minimally processed food intake (HR for a 100 g/d increase, 1.05; 95% CI, 1.02-1.08). Conclusions and Relevance: In this large observational prospective study, a higher proportion of UPF in the diet was associated with a higher risk of T2D. Even though these results need to be confirmed in other populations and settings, they provide evidence to support efforts by public health authorities to recommend limiting UPF consumption. Trial Registration: ClinicalTrials.gov Identifier: NCT03335644.

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Overview

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TL;DR

In the French NutriNet-Santé prospective cohort, higher ultraprocessed food (UPF) consumption was associated with increased type 2 diabetes (T2D) risk. The association persisted after adjustment for diet quality, metabolic comorbidities, and weight change.

Key findings

  • Among 104,707 participants, 821 incident T2D cases occurred over 582,252 person-years (median follow-up 6.0 years).
  • Each 10-point increment in the percentage of UPF in the diet was associated with T2D risk: Model 1 HR, 1.15 (95% CI, 1.06-1.25); after further adjustment for metabolic comorbidities, HR, 1.13 (95% CI, 1.03-1.23); after adjustment for weight change, HR, 1.13 (95% CI, 1.01-1.27).
  • Absolute UPF consumption was also associated with T2D risk: HR for a 100 g/d increase, 1.05 (95% CI, 1.02-1.08), even when adjusting for unprocessed/minimally processed food intake.
  • The proportion of unprocessed/minimally processed foods was inversely associated with T2D risk: HR for a 10-point increment, 0.91 (95% CI, 0.84-0.98). Absolute T2D rates were 113 and 166 per 100,000 person-years in the lowest and highest UPF consumers, respectively.

Methods

  • Population-based prospective cohort study using the French NutriNet-Santé cohort (2009-2019); 104,707 adults aged 18 years or older were included (21,800 men [20.8%] and 82,907 women [79.2%]; mean [SD] baseline age, 42.7 [14.5] years).
  • Dietary intake was collected with repeated validated web-based 24-hour dietary records (5.7 per participant on average) covering more than 3500 food items; foods were categorized by degree of processing using the NOVA classification.
  • Cause-specific multivariable Cox proportional hazard models with age as timescale and left truncation assessed UPF proportion and T2D incidence, treating T2D and death as competing events; models adjusted for sociodemographic, anthropometric, lifestyle, medical history, and nutritional factors, with multiple imputation for missing data.

Limitations

  • The paper states that T2D case ascertainment exhaustiveness could not be guaranteed, with about 20% of T2D cases estimated to be underdiagnosed in France, likely reducing statistical power and potentially underestimating associations.
  • The paper states that causation cannot be established from this single observational study and residual confounding cannot be entirely ruled out; NOVA misclassification and the broad, heterogeneous UPF category are also noted as limitations.
  • The paper states that participants were younger, more often women, more educated, and had healthier dietary habits than the general French population, with lower T2D incidence, which may have limited statistical power, especially for stratified analyses such as in men.

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Integrity signals

Registry

Crossref · 10.1001/jamainternmed.2019.5942

Cites

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  • It may state two separate claims as one. 21
  • Probably not a substantial claim. 12
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  • The paper relies on this without support.

    No prior large-scale prospective study had evaluated the association between UPF consumption and T2D risk before this study.

    “However, no such large-scale prospective study has been conducted regarding T2D.”
    “no prior prospective epidemiological study had evaluated their association with T2D risk.”
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Metadata

Authors
Srour, B., Fezeu, L. K., Kesse-Guyot, E., Allès, B., Debras, C., Druesne-Pecollo, N., Chazelas, E., Deschasaux, M., Hercberg, S., Galan, P., Monteiro, C. A., Julia, C., & Touvier, M.
Affiliations
  • Inserm (FR)
  • Paris 13 University, Inserm, Inra, Cnam, Nutritional Epidemiology Research Team (EREN), Epidemiology and Statistics Research Center–University of Paris (CRESS), 93017 Bobigny, France
  • Universidade de São Paulo (BR)
Corresponding author
Srour, Bernard
Venue
JAMA Internal Medicine
Published
2020-02-01
Volume
180
Issue
2
Pages
283
ISSN
2168-6106 (ISSN-L)
OpenAlex
W2995681102
Cited by
465
References
89
Citations by year
2026: 45 · 2025: 69 · 2024: 80 · 2023: 53 · 2022: 85 · 2021: 96 · 2020: 34
FWCI
49.73
Type
journal article
Language
en
Open access
Locations
  • JAMA Internal Medicine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Consumer Attitudes and Food Labeling
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
ultra-processed foods, type 2 diabetes, NOVA classification, diabetes risk, NutriNet-Santé cohort, diet quality, weight change, metabolic comorbidities, cancer
MeSH terms
Adult, Diabetes Mellitus, Type 2, Diet, Female, Food Handling, France, Humans, Male, Middle Aged, Prospective Studies, Cohort Studies, Proportional Hazards Models

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