PMID- 32491181 OWN - NLM STAT- MEDLINE DCOM- 20210208 LR - 20210208 IS - 1945-7197 (Electronic) IS - 0021-972X (Linking) VI - 105 IP - 8 DP - 2020 Aug 1 TI - Effect of Vitamin D Supplementation on the Incidence of Diabetes Mellitus. LID - dgaa335 [pii] LID - 10.1210/clinem/dgaa335 [doi] AB - CONTEXT: The effect of vitamin D supplementation on the risk of type 2 diabetes mellitus (T2DM) remains controversial because most randomized controlled trials (RCTs) have been small or have reported low doses of vitamin D. OBJECTIVE: To conduct a meta-analysis of RCTs testing vitamin D supplementation in the prevention of T2DM. DATA SOURCES: Database search of PubMed/MEDLINE, EMBASE, and the Cochrane Library was performed by 2 reviewers from inception through September 15, 2019. STUDY SELECTION: We included RCTs that reported the effect of vitamin D supplementation for at least 1 year on T2DM prevention. DATA EXTRACTION: Two independent reviewers extracted the data. The risk ratios (RRs) and 95% confidence intervals (CIs) were reported. Primary outcome of the meta-analysis was the incidence of T2DM. DATA SYNTHESIS: Nine RCTs were included (43 559 participants). The mean age (standard deviation) was 63.5 (6.7) years. The RR for vitamin D compared with placebo was 0.96 (95% CI, 0.90-1.03); P = 0.30. In trials testing moderate to high doses of supplementation (>/=1000 IU/day), all conducted among participants with prediabetes, the RR for vitamin D compared with placebo was 0.88 (95% CI, 0.79-0.99). In contrast, the trials testing lower doses, which were conducted in general population samples, showed no risk reduction (RR, 1.02; 95% CI, 0.94-1.10; P, interaction by dose = 0.04). CONCLUSION: In patients with prediabetes, vitamin D supplementation at moderate to high doses (>/=1000 IU/day), significantly reduced the incidence risk of T2DM, compared with placebo. CI - (c) Endocrine Society 2020. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. FAU - Barbarawi, Mahmoud AU - Barbarawi M AD - Department of Internal Medicine, Hurley Medical Center/Michigan State University, Flint, MI, USA. FAU - Zayed, Yazan AU - Zayed Y AD - Department of Internal Medicine, Hurley Medical Center/Michigan State University, Flint, MI, USA. FAU - Barbarawi, Owais AU - Barbarawi O AD - Department of Internal Medicine, Mutah University, Al-Karak, Jordan. FAU - Bala, Areeg AU - Bala A AD - Department of Internal Medicine, Hurley Medical Center/Michigan State University, Flint, MI, USA. FAU - Alabdouh, Ahmad AU - Alabdouh A AD - Department of Internal Medicine, Saint Agnes Hospital, Baltimore, MD, USA. FAU - Gakhal, Inderdeep AU - Gakhal I AD - Department of Internal Medicine, Hurley Medical Center/Michigan State University, Flint, MI, USA. FAU - Rizk, Fatima AU - Rizk F AD - Michigan State University, College of Osteopathic Medicine, East Lansing, MI, USA. FAU - Alkasasbeh, Mariam AU - Alkasasbeh M AD - Department of Nutrition, University of Jordan, Amman, Jordan. FAU - Bachuwa, Ghassan AU - Bachuwa G AD - Department of Internal Medicine, Hurley Medical Center/Michigan State University, Flint, MI, USA. FAU - Manson, JoAnn E AU - Manson JE AD - Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA. LA - eng PT - Journal Article PT - Meta-Analysis PL - United States TA - J Clin Endocrinol Metab JT - The Journal of clinical endocrinology and metabolism JID - 0375362 RN - 0 (Placebos) RN - 1406-16-2 (Vitamin D) SB - IM MH - Diabetes Mellitus, Type 2/*epidemiology/prevention & control MH - *Dietary Supplements MH - Dose-Response Relationship, Drug MH - Humans MH - Incidence MH - Placebos/administration & dosage MH - Prediabetic State/*diet therapy MH - Randomized Controlled Trials as Topic MH - Treatment Outcome MH - Vitamin D/*administration & dosage OTO - NOTNLM OT - body mass index OT - diabetes mellitus OT - meta-analysis OT - prediabetes OT - vitamin D EDAT- 2020/06/04 06:00 MHDA- 2021/02/09 06:00 CRDT- 2020/06/04 06:00 PHST- 2020/01/15 00:00 [received] PHST- 2020/03/03 00:00 [revised] PHST- 2020/05/26 00:00 [accepted] PHST- 2020/06/04 06:00 [pubmed] PHST- 2021/02/09 06:00 [medline] PHST- 2020/06/04 06:00 [entrez] AID - 5850844 [pii] AID - 10.1210/clinem/dgaa335 [doi] PST - ppublish SO - J Clin Endocrinol Metab. 2020 Aug 1;105(8):dgaa335. doi: 10.1210/clinem/dgaa335.