Skip to main content
Top

Open Access 21-04-2024 | Prostate Cancer | Review

Protein intake and cancer: an umbrella review of systematic reviews for the evidence-based guideline of the German Nutrition Society

Authors: Tilman Kühn, Nicole Kalotai, Anna M. Amini, Julia Haardt, Andreas Lehmann, Annemarie Schmidt, Anette E. Buyken, Sarah Egert, Sabine Ellinger, Anja Kroke, Stefan Lorkowski, Sandrine Louis, Matthias B. Schulze, Lukas Schwingshackl, Roswitha Siener, Gabriele I. Stangl, Bernhard Watzl, Armin Zittermann, Katharina Nimptsch, on behalf of the German Nutrition Society

Published in: European Journal of Nutrition

Login to get access

Abstract

Purpose

It has been proposed that a higher habitual protein intake may increase cancer risk, possibly via upregulated insulin-like growth factor signalling. Since a systematic evaluation of human studies on protein intake and cancer risk based on a standardised assessment of systematic reviews (SRs) is lacking, we carried out an umbrella review of SRs on protein intake in relation to risks of different types of cancer.

Methods

Following a pre-specified protocol (PROSPERO: CRD42018082395), we retrieved SRs on protein intake and cancer risk published before January 22th 2024, and assessed the methodological quality and outcome-specific certainty of the evidence using a modified version of AMSTAR 2 and NutriGrade, respectively. The overall certainty of evidence was rated according to predefined criteria.

Results

Ten SRs were identified, of which eight included meta-analyses. Higher total protein intake was not associated with risks of breast, prostate, colorectal, ovarian, or pancreatic cancer incidence. The methodological quality of the included SRs ranged from critically low (kidney cancer), low (pancreatic, ovarian and prostate cancer) and moderate (breast and prostate cancer) to high (colorectal cancer). The outcome-specific certainty of the evidence underlying the reported findings on protein intake and cancer risk ranged from very low (pancreatic, ovarian and prostate cancer) to low (colorectal, ovarian, prostate, and breast cancer). Animal and plant protein intakes were not associated with cancer risks either at a low (breast and prostate cancer) or very low (pancreatic and prostate cancer) outcome-specific certainty of the evidence. Overall, the evidence for the lack of an association between protein intake and (i) colorectal cancer risk and (ii) breast cancer risk was rated as possible. By contrast, the evidence underlying the other reported results was rated as insufficient.

Conclusion

The present findings suggest that higher total protein intake may not be associated with the risk of colorectal and breast cancer, while conclusions on protein intake in relation to risks of other types of cancer are restricted due to insufficient evidence.
Appendix
Available only for authorised users
Literature
26.
go back to reference Alonso-Coello P, Schünemann HJ, Moberg J et al. (2016) GRADE Evidence to Decision (EtD) frameworks: a systematic and transparent approach to making well informed healthcare choices. 1: Introduction. BMJ 353:i2016. doi: https://doi.org/10.1136/bmj.i2016 Alonso-Coello P, Schünemann HJ, Moberg J et al. (2016) GRADE Evidence to Decision (EtD) frameworks: a systematic and transparent approach to making well informed healthcare choices. 1: Introduction. BMJ 353:i2016. doi: https://​doi.​org/​10.​1136/​bmj.​i2016
36.
go back to reference Subar AF, Kushi LH, Lerman JL et al (2017) Invited commentary: the contribution to the field of nutritional epidemiology of the landmark 1985 publication by Willett et al. Am J Epidemiol 185:1124–1129CrossRefPubMed Subar AF, Kushi LH, Lerman JL et al (2017) Invited commentary: the contribution to the field of nutritional epidemiology of the landmark 1985 publication by Willett et al. Am J Epidemiol 185:1124–1129CrossRefPubMed
50.
go back to reference Giovannucci E, Pollak M, Liu Y et al (2003) Nutritional predictors of insulin-like growth factor I and their relationships to cancer in men. Cancer Epidemiol Biomarkers Prev 12:84–89PubMed Giovannucci E, Pollak M, Liu Y et al (2003) Nutritional predictors of insulin-like growth factor I and their relationships to cancer in men. Cancer Epidemiol Biomarkers Prev 12:84–89PubMed
51.
go back to reference Holmes MD, Pollak MN, Willett WC et al (2002) Dietary correlates of plasma insulin-like growth factor I and insulin-like growth factor binding protein 3 concentrations. Cancer Epidemiol Biomarkers Prev 11:852–861PubMed Holmes MD, Pollak MN, Willett WC et al (2002) Dietary correlates of plasma insulin-like growth factor I and insulin-like growth factor binding protein 3 concentrations. Cancer Epidemiol Biomarkers Prev 11:852–861PubMed
58.
go back to reference DeLellis K, Rinaldi S, Kaaks RJ et al (2004) Dietary and lifestyle correlates of plasma insulin-like growth factor-I (IGF-I) and IGF binding protein-3 (IGFBP-3): the multiethnic cohort. Cancer Epidemiol Biomarkers Prev 13:1444–1451CrossRefPubMed DeLellis K, Rinaldi S, Kaaks RJ et al (2004) Dietary and lifestyle correlates of plasma insulin-like growth factor-I (IGF-I) and IGF binding protein-3 (IGFBP-3): the multiethnic cohort. Cancer Epidemiol Biomarkers Prev 13:1444–1451CrossRefPubMed
62.
go back to reference Signorello LB, Kuper H, Lagiou P et al (2000) Lifestyle factors and insulin-like growth factor 1 levels among elderly men. Eur J Cancer Prev 9:173–178CrossRefPubMed Signorello LB, Kuper H, Lagiou P et al (2000) Lifestyle factors and insulin-like growth factor 1 levels among elderly men. Eur J Cancer Prev 9:173–178CrossRefPubMed
65.
go back to reference Newmark HL, Wargovich MJ, Bruce WR (1984) Colon cancer and dietary fat, phosphate, and calcium: a hypothesis. J Natl Cancer Inst 72:1323–1325PubMed Newmark HL, Wargovich MJ, Bruce WR (1984) Colon cancer and dietary fat, phosphate, and calcium: a hypothesis. J Natl Cancer Inst 72:1323–1325PubMed
67.
go back to reference Zhao Z, Feng Q, Yin Z et al (2017) Red and processed meat consumption and colorectal cancer risk: a systematic review and meta-analysis. Oncotarget 8:83306–83314CrossRefPubMedPubMedCentral Zhao Z, Feng Q, Yin Z et al (2017) Red and processed meat consumption and colorectal cancer risk: a systematic review and meta-analysis. Oncotarget 8:83306–83314CrossRefPubMedPubMedCentral
Metadata
Title
Protein intake and cancer: an umbrella review of systematic reviews for the evidence-based guideline of the German Nutrition Society
Authors
Tilman Kühn
Nicole Kalotai
Anna M. Amini
Julia Haardt
Andreas Lehmann
Annemarie Schmidt
Anette E. Buyken
Sarah Egert
Sabine Ellinger
Anja Kroke
Stefan Lorkowski
Sandrine Louis
Matthias B. Schulze
Lukas Schwingshackl
Roswitha Siener
Gabriele I. Stangl
Bernhard Watzl
Armin Zittermann
Katharina Nimptsch
on behalf of the German Nutrition Society
Publication date
21-04-2024
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Nutrition
Print ISSN: 1436-6207
Electronic ISSN: 1436-6215
DOI
https://doi.org/10.1007/s00394-024-03380-4
Obesity Clinical Trial Summary

At a glance: The STEP trials

A round-up of the STEP phase 3 clinical trials evaluating semaglutide for weight loss in people with overweight or obesity.

Developed by: Springer Medicine

Highlights from the ACC 2024 Congress

Year in Review: Pediatric cardiology

Watch Dr. Anne Marie Valente present the last year's highlights in pediatric and congenital heart disease in the official ACC.24 Year in Review session.

Year in Review: Pulmonary vascular disease

The last year's highlights in pulmonary vascular disease are presented by Dr. Jane Leopold in this official video from ACC.24.

Year in Review: Valvular heart disease

Watch Prof. William Zoghbi present the last year's highlights in valvular heart disease from the official ACC.24 Year in Review session.

Year in Review: Heart failure and cardiomyopathies

Watch this official video from ACC.24. Dr. Biykem Bozkurt discusses last year's major advances in heart failure and cardiomyopathies.