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Published in: European Journal of Nutrition 1/2020

Open Access 01-02-2020 | Coronary Heart Disease | Original Contribution

Chocolate and risk of chronic disease: a systematic review and dose-response meta-analysis

Authors: Jakub Morze, Carolina Schwedhelm, Aleksander Bencic, Georg Hoffmann, Heiner Boeing, Katarzyna Przybylowicz, Lukas Schwingshackl

Published in: European Journal of Nutrition | Issue 1/2020

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Abstract

Purpose

Evidence for the association between chocolate intake and risk of chronic diseases is inconclusive. Therefore, we aimed to synthesize and evaluate the credibility of evidence on the dose-response association between chocolate consumption with risk of all-cause mortality, coronary heart disease (CHD), stroke, heart failure (HF), type 2 diabetes (T2D), colorectal cancer (CRC), and hypertension.

Methods

Prospective studies were searched until July 2018 in PubMed, Embase, and Web of Science. Random-effects meta-analyses comparing highest versus lowest intake categories, linear, and non-linear dose-response analyses were conducted. The credibility of evidence was evaluated with the NutriGrade scoring-system.

Results

Overall, 27 investigations were identified (n = 2 for all-cause mortality, n = 9 for CHD, n = 8 for stroke, n = 6 for HF, n = 6 for T2D, n = 2 for hypertension and CRC, respectively). No associations with HF (RR 0.99, 95% CI 0.94, 1.04) and T2D (RR 0.94, 95% CI 0.88, 1.01) per each 10 g/day increase in chocolate intake were observed in the linear dose-response meta-analyses. However, a small inverse association for each 10 g/daily increase could be shown for the risk of CHD (RR 0.96, 95% CI 0.93, 0.99), and stroke (RR 0.90, 95% CI 0.82, 0.98). The credibility of evidence was rated either very low (all-cause mortality, HF, T2D, CRC or hypertension) or low (CHD, stroke).

Conclusion

Chocolate consumption is not related to risk for several chronic diseases, but could have a small inverse association with CHD and stroke. Our findings are limited by very low or low credibility of evidence, highlighting important uncertainty for chocolate–disease associations.
Appendix
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Metadata
Title
Chocolate and risk of chronic disease: a systematic review and dose-response meta-analysis
Authors
Jakub Morze
Carolina Schwedhelm
Aleksander Bencic
Georg Hoffmann
Heiner Boeing
Katarzyna Przybylowicz
Lukas Schwingshackl
Publication date
01-02-2020
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Nutrition / Issue 1/2020
Print ISSN: 1436-6207
Electronic ISSN: 1436-6215
DOI
https://doi.org/10.1007/s00394-019-01914-9

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