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Diabetes treated and prevented by more than 2,000 IU of vitamin D (need more and gut-friendly) - meta-analyses 2018

Two meta-analyses from China on this page > 2,000 IU treats, > 2,000 IU prevents

The Effect of Vitamin D Supplementation on Glycemic Control in Type 2 Diabetes Patients: A Systematic Review and Meta-Analysis = March 2018

Nutrients 2018, 10(3), 375; doi:10.3390/nu10030375
Xinyi Li, Yan Liu, Yingdong Zheng, Peiyu Wang and Yumei Zhang zhangyumei at bjmu.edu.cn
School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Beijing 100191, China


Pages listed in BOTH of the categories Diabetes and Meta-analysis

Pages listed in BOTH of the categories Diabetes and Intervention

 Download the PDF from VitaminDWiki

Observational studies have indicated an inverse association between vitamin D levels and the risk of diabetes, yet evidence from population interventions remains inconsistent. PubMed, EMBASE, Cochrane Library and ClinicalTrials.gov were searched up to September 2017. Data from studies regarding serum 25(OH)D, fasting blood glucose (FBG), hemoglobin A1c (HbA1c), fasting insulin and homeostasis model assessment of insulin resistance (HOMA-IR) were pooled. Twenty studies (n = 2703) were included in the meta-analysis. Vitamin D supplementation resulted in a significant improvement in serum 25(OH)D levels (weighted mean difference (WMD) = 33.98; 95%CI: 24.60–43.37) and HOMA-IR (standardized mean difference (SMD) = −0.57; 95%CI: −1.09~−0.04), but not in other outcomes. However, preferred changes were observed in subgroups as follows: short-term (WMDFBG = −8.44; 95%CI: −12.72~−4.15), high dose (WMDFBG = −8.70; 95%CI: −12.96~−4.44), non-obese (SMDFasting insulin = −1.80; 95%CI: −2.66~−0.95), Middle Easterners (WMDFBG = −10.43; 95%CI: −14.80~−6.06), baseline vitamin D deficient individuals (WMDFBG = −5.77; 95%CI: −10.48~−1.05) and well-controlled HbA1c individuals (WMDFBG = −4.09; 95%CI: −15.44~7.27). Vitamin D supplementation was shown to increase serum 25(OH)D and reduce insulin resistance effectively. This effect was especially prominent when vitamin D was given in large doses and for a short period of time, and to patients who were non-obese, Middle Eastern, vitamin D deficient, or with optimal glycemic control at baseline.

Effect of vitamin D supplementation on fasting plasma glucose, insulin resistance and prevention of type 2 diabetes mellitus in non-diabetics: A systematic review and meta-analysis. - May 2018

Biomed Rep. 2018 May;8(5):475-484. doi: 10.3892/br.2018.1074. Epub 2018 Mar 9.
He S1, Yu S1, Zhou Z1, Wang C2, Wu Y1, Li W3.
1 Department of Sanitary Chemistry, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China.
2 Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China.
3 Department of Nutrition and Food Hygiene, College of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China.

Increasing epidemiological studies suggest that there is an association between vitamin D deficiency and risk of type 2 diabetes mellitus (T2DM). Therefore, randomized clinical trials (RCTs) have been performed to observe the effect of vitamin D supplementation on preventing T2DM, decreasing fasting plasma glucose (FPG) and improving insulin resistance to confirm the association between vitamin D and T2DM. However, the results of RCTs on controlling FPG level, improving insulin resistance and preventing T2DM in non-diabetics are inconsistent. In the present study, a systematic meta-analysis considering individual variation and intervention strategy was conducted to establish an objective and definitive conclusion. The results suggested that vitamin D supplementation had no significant effect on controlling FPG level, improving insulin resistance or preventing T2DM in non-diabetics in a pooled meta-analysis of 23 articles (containing 28 RCTs). However, stratified analysis indicated that supplementation of vitamin D had differential effects on FPG control, insulin sensitivity improvement and T2DM prevention in individuals with different baseline states: FPG was decreased for those with BMI <25 (P=0.048) or 20≤ 25(OH)D <30 ng/ml (P=0.002); insulin resistance was improved for those with 25(OH)D ≥30 ng/ml (P=0.021); and risk of T2DM was lower for pre-diabetic individuals (P=0.047) or for those with 25≤ BMI <30 (P=0.032). Additionally, the effect on T2DM prevention was improved when the supplement dose was >2,000 IU/day (P=0.047) and with intervention without calcium (P=0.047). Thus, further trials should focus on individual baselines and the supplementation strategy of vitamin D in the prevention of T2DM.

PMID: 29725526 PMCID: PMC5920274 DOI: 10.3892/br.2018.1074

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9577 China Diabetes Meta.pdf PDF 2018 admin 24 Mar, 2018 13:43 2.15 Mb 131
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