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. 2023 Jan 31:56:101840.
doi: 10.1016/j.eclinm.2023.101840. eCollection 2023 Feb.

Ultra-processed food consumption, cancer risk and cancer mortality: a large-scale prospective analysis within the UK Biobank

Kiara Chang  1 , Marc J Gunter  2 , Fernanda Rauber  3   4 , Renata B Levy  3   4 , Inge Huybrechts  2 , Nathalie Kliemann  2 , Christopher Millett  1   5 , Eszter P Vamos  1
Affiliations

Ultra-processed food consumption, cancer risk and cancer mortality: a large-scale prospective analysis within the UK Biobank

Kiara Chang et al. EClinicalMedicine. .

Abstract

Background: Global dietary patterns are increasingly dominated by relatively cheap, highly palatable, and ready-to-eat ultra-processed foods (UPFs). However, prospective evidence is limited on cancer development and mortality in relation to UPF consumption. This study examines associations between UPF consumption and risk of cancer and associated mortality for 34 site-specific cancers in a large cohort of British adults.

Methods: This study included a prospective cohort of UK Biobank participants (aged 40-69 years) who completed 24-h dietary recalls between 2009 and 2012 (N = 197426, 54.6% women) and were followed up until Jan 31, 2021. Food items consumed were categorised according to their degree of food processing using the NOVA food classification system. Individuals' UPF consumption was expressed as a percentage of total food intake (g/day). Prospective associations were assessed using multivariable Cox proportional hazards models adjusted for baseline socio-demographic characteristics, smoking status, physical activity, body mass index, alcohol and total energy intake.

Findings: The mean UPF consumption was 22.9% (SD 13.3%) in the total diet. During a median follow-up time of 9.8 years, 15,921 individuals developed cancer and 4009 cancer-related deaths occurred. Every 10 percentage points increment in UPF consumption was associated with an increased incidence of overall (hazard ratio, 1.02; 95% CI, 1.01-1.04) and specifically ovarian (1.19; 1.08-1.30) cancer. Furthermore, every 10 percentage points increment in UPF consumption was associated with an increased risk of overall (1.06; 1.03-1.09), ovarian (1.30; 1.13-1.50), and breast (1.16; 1.02-1.32) cancer-related mortality.

Interpretation: Our UK-based cohort study suggests that higher UPF consumption may be linked to an increased burden and mortality for overall and certain site-specific cancers especially ovarian cancer in women.

Funding: The Cancer Research UK and World Cancer Research Fund.

Keywords: Cancer incidence; Cancer mortality; Prospective cohort; Ultra-processed food; United Kingdom.

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Conflict of interest statement

All authors declare no conflict of interest.

Figures

Fig. 1
Fig. 1
Sources of NOVA subgroups in the total diet by quartile of ultra-processed food consumption. UPF, ultra-processed food. UPF consumption was defined as the percentage of its weight contribution relative to total food intake measured in g/day. Study participants were further categorised into quartiles (Q1-Q4 represents lowest to highest quartile of UPF consumption).
See this image and copyright information in PMC

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