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Tea consumption and risk of type 2 diabetes: a dose–response meta-analysis of cohort studies
Open accessAbstract
Tea consumption has inconsistently been shown to be associated with the risk of type 2 diabetes (T2D). The aim of the present study was to conduct a dose–response meta-analysis of cohort studies assessing the association between consumption of tea and risk of developing T2D. Pertinent studies were identified by searching PubMed, Web of Science and EMBASE through 31 March 2013. A total of sixteen cohorts from fifteen articles that reported 37 445 cases of diabetes among 545 517 participants were included. A significant linearly inverse association between tea consumption and T2D risk was found (P for linear trend = 0·02). An increase of 2 cups/d in tea consumption was found to be associated with a 4·6 (95 % CI 0·9, 8·1) % reduced risk of T2D. On the basis of the dose–response meta-analysis, the predicted relative risks of diabetes for 0, 1, 2, 3, 4, 5 and 6 cups of tea consumed per d were 1·00 (referent), 0·97 (95 % CI 0·94, 1·01), 0·95(95 % CI 0·92, 0·98), 0·93 (95 % CI 0·88, 0·98), 0·90 (95 % CI 0·85, 0·96), 0·88 (95 % CI 0·83, 0·93) and 0·85 (95 % CI 0·80, 0·91), respectively. There was a statistically significant heterogeneity within the selected studies (Q= 45·32, P< 0·001, I2= 60·3 %). No evidence of substantial small-study bias was found (P= 0·46). Our findings suggest that tea consumption could be linearly inversely associated with T2D risk. Future well-designed observational studies that account for different characteristics of tea such as tea types, preparation methods and tea strength are needed to fully characterise such an association.
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“Similar to coffee consumption, tea consumption is associated with lower risk of diabetes and CVD, especially comparing very frequent consumption (3-4 cups/day) with none (Figure 6).275, 276”
From Dietary and Policy Priorities for Cardiovascular Disease, Diabetes, and Obesity: A Comprehensive Review (2016) · cites this paper as [275]
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“Similar to coffee consumption, tea consumption is associated with lower risk of diabetes and CVD, especially comparing very frequent consumption (3-4 cups/day) with none (Figure 6).275, 276”
From Dietary and Policy Priorities for Cardiovascular Disease, Diabetes, and Obesity: A Comprehensive Review (2016) · cites this paper as [276]
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Methods for Trend Estimation from Summarized Dose-Response Data, with Applications to Meta-Analysis
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Nutrition's role in extending healthspan: CRN-international symposium report
Huber, L. G., Bischoff-Ferrari, H. A., Folta, S. C., Marsman, D. S., Moore, D. R., Shao, A. E., Stout, M., Williamson, G., & Griffiths, J. C. (2026) · European Journal of Nutrition · doi:10.1007/s00394-025-03860-1
Metadata
- Authors
- Yang, W.-S., Wang, W.-Y., Fan, W.-Y., Deng, Q., & Wang, X.
- Affiliations
- Jiujiang University (CN)
- Corresponding author
- Wang, Xin
- ORCID
- Deng, Qin
- Venue
- British Journal of Nutrition
- Publisher
- Cambridge University Press (CUP)
- Published
- 2013-12-04
- Volume
- 111
- Issue
- 8
- Pages
- 1329-1339
- ISSN
- 0007-1145 (ISSN-L)
- 1475-2662
- OpenAlex
- W2156772059
- Cited by
- 103
- References
- 46
- Citations by year
- 2026: 2 · 2025: 7 · 2024: 7 · 2023: 3 · 2022: 7 · 2021: 9 · 2020: 12 · 2019: 16 · 2018: 13 · 2017: 9 · 2016: 11 · 2015: 5 · 2014: 2
- FWCI
- 0.88
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- British Journal Of Nutrition (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Tea Polyphenols and Effects
- Health Sciences › Medicine › Pharmacology (medical) › Coffee research and impacts
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
- Keywords
- tea consumption, type 2 diabetes, dose-response relationship, diabetes risk, tea types
- MeSH terms
- Diabetes Mellitus, Type 2, Dose-Response Relationship, Drug, Humans, Phytotherapy, Tea, Cohort Studies, Camellia sinensis, Plant Preparations
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