PMID- 37647847 OWN - NLM STAT- MEDLINE DCOM- 20231023 LR - 20231106 IS - 1879-0739 (Electronic) IS - 0271-5317 (Linking) VI - 118 DP - 2023 Oct TI - Daily higher tea consumption is associated with a reduced risk of type 2 diabetes: A cohort study and updated systematic review and meta-analysis. PG - 116-127 LID - S0271-5317(23)00073-8 [pii] LID - 10.1016/j.nutres.2023.08.002 [doi] AB - Tea is abundant in phytochemicals (such as polyphenols and theaflavins), which have a hypoglycemic effect. Previous studies investigating the relationship between tea consumption and the risk of type 2 diabetes mellitus (T2DM) have yielded inconsistent results. We hypothesized that tea consumption would be associated with a reduced risk of T2DM. This cohort study used data from the China Health and Nutrition Survey, involving a total of 5199 participants initially recruited in 1997 and subsequently followed until 2009. Consumption of any variety of tea was tracked using structured questionnaires, and T2DM was diagnosed according to the American Diabetes Association's criteria. We also performed a systematic literature search of PubMed, Web of Science, and EMBASE for publications through September 2021, including 19 cohort studies comprising 1,076,311 participants. In our cohort study, the logistic regression model showed a relative risk (RR) of T2DM among tea drinkers of 1.02 (95% confidence interval [CI], 0.82-1.28) compared with non-tea drinkers. Although our updated meta-analysis showed no significant association between tea consumption and T2DM on the whole (pooled RR of 0.96 [0.91-1.00]), compared with the non-tea-drinking group, participants consuming 4 or more cups of tea per day had a 17% reduced risk of T2DM, with an RR of 0.83 (95% CI, 0.76-0.90). These data support our hypothesis that tea consumption at higher doses (e.g., >/=4 cups/day) is associated with a reduced risk of T2DM. CI - Copyright (c) 2023 Elsevier Inc. All rights reserved. FAU - Li, Xiaying AU - Li X AD - College of Medicine, Wuhan University of Science and Technology, Wuhan, Hubei, China. FAU - Zeng, Jingjing AU - Zeng J AD - Center for Clinical Evidence-Based and Translational Medicine, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. FAU - Chen, Bo AU - Chen B AD - Center for Clinical Evidence-Based and Translational Medicine, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. FAU - Yan, Qiongjie AU - Yan Q AD - Center for Clinical Evidence-Based and Translational Medicine, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. FAU - Cui, Yuze AU - Cui Y AD - Center for Clinical Evidence-Based and Translational Medicine, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. FAU - Xu, Wenlei AU - Xu W AD - Center for Clinical Evidence-Based and Translational Medicine, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. FAU - Zhang, Xiaotong AU - Zhang X AD - Department of Nephrology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. FAU - Xu, Shaoyong AU - Xu S AD - Center for Clinical Evidence-Based and Translational Medicine, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China; Department of Endocrinology, Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China. Electronic address: yoji_xu@hotmail.com. LA - eng PT - Journal Article PT - Meta-Analysis PT - Research Support, Non-U.S. Gov't PT - Systematic Review DEP - 20230807 PL - United States TA - Nutr Res JT - Nutrition research (New York, N.Y.) JID - 8303331 RN - 0 (Tea) RN - 0 (Polyphenols) SB - IM MH - Humans MH - *Diabetes Mellitus, Type 2/epidemiology/prevention & control MH - Cohort Studies MH - Tea MH - Risk MH - Polyphenols MH - Risk Factors OTO - NOTNLM OT - China Health and Nutrition Survey OT - Cohort study OT - Meta-analysis OT - Tea consumption OT - Type 2 diabetes mellitus COIS- Declaration of Competing Interest None EDAT- 2023/08/31 00:41 MHDA- 2023/10/23 12:43 CRDT- 2023/08/30 18:09 PHST- 2023/04/11 00:00 [received] PHST- 2023/07/31 00:00 [revised] PHST- 2023/08/06 00:00 [accepted] PHST- 2023/10/23 12:43 [medline] PHST- 2023/08/31 00:41 [pubmed] PHST- 2023/08/30 18:09 [entrez] AID - S0271-5317(23)00073-8 [pii] AID - 10.1016/j.nutres.2023.08.002 [doi] PST - ppublish SO - Nutr Res. 2023 Oct;118:116-127. doi: 10.1016/j.nutres.2023.08.002. Epub 2023 Aug 7.