Type 2 Diabetes treated by Vitamin D (often 50,000 IU weekly) – meta-analysis July 2023

---

Serum and supplemental vitamin D levels and insulin resistance in T2DM populations: a meta-analysis and systematic review

Xingxing Lei, Qian Zhou, Yanmei Wang, Shunlian Fu, Zinan Li & Qiu Chen
Scientific Reports volume 13, Article number: 12343 (2023)

Observational studies have shown a negative correlation between Vitamin D level and the likelihood of developing insulin resistance (IR) and/or diabetes over time, yet evidence remains inconsistent. In this meta-analysis and systematic review, we strive to define the potential association between serum or supplemental Vitamin D Levels and insulin resistance respectively, as well as the contribution of Vitamin D to type 2 diabetes, and to summarize the biologic plausibility of Vitamin D. Four databases (PubMed, Embase, Cochrane Library, and Web of Science) were searched for this Systematic Literature Review (SLR) to find appropriate observational studies and clinical trials published in English through to July 2022. EndNote (version X9) is used to manage the literature search results. We calculated Standard Mean Differences (SMDs) and Risk Ratios (RRs) with their 95% Confidence Intervals (CIs), separately, for continuous and dichotomous outcomes. The correlation coefficients were normalized to z values through Fisher’s z-transformation to calculate the relevant statistics. Meta-analyses were carried out for all comparisons, based on a random-effects pooling model. Data analysis was performed using RevMan (version 5.3) and STATA (version 15.1). All statistical tests were two-sided, with P < 0.05 were regarded as significant. In our current meta-analysis, there are 18 RCTs and 20 observational studies including 1243 and 11,063 participants respectively. In the overall analysis, the diabetic with Vitamin D supplement treatment group showed significantly improve serum insulin (SMD =  − 0.265, 95% CI − 0.394 to − 0.136, P < 0.05), glucose (SMD =  − 0.17, 95% CI − 0.301to − 0.039, P < 0.05) and HOMA-IR (SMD =  − 0.441, 95% CI − 0.582 to − 0.3, P < 0.05) compared with the routine treatment group. Correlation analysis results showed that all three outcomes were significantly correlated in a negative manner with raised Vitamin D (

• insulin: r =  − 0.08 95% =  − 0.12 to − 0.04;
• glucose: r =  − 0.06 95% =  − 0.11 to − 0.01;
• HOMA-IR: r =  − 0.08 95% =  − 0.09 to − 0.06).

Results of overall analysis proved that vitamin D has shown significant effect on regulates insulin resistance, and there is a significant inverse association between serum Vitamin D level and IR. Vitamin D supplementation is expected to be integrated into conventional medical approaches to prevent type 2 diabetes and to mitigate the burden of diabetes for individuals and society.
 Download the PDF from VitaminDWiki

---

Vitamin D deficiency and its associated factors among patients with type 2 diabetes mellitus: a systematic review and meta-analysis - Oct 2023

BMJ Open . 2023 Oct 5;13(10):e075607. doi: 10.1136/bmjopen-2023-075607.
Mitku Mammo Taderegew 1, Gashaw Garedew Woldeamanuel 2, Alemayehu Wondie 2, Atsede Getawey 2, Abera Nesiru Abegaz 2, Fentahun Adane 3

Objective: The study intended to assess the pooled prevalence of vitamin D deficiency (VDD) and its associated factors among patients with type 2 diabetes mellitus (T2DM).

Design: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were employed to plan and conduct this systematic review and meta-analysis.

Data sources: PubMed, Medline, Google Scholar, Web of Science, Science Direct and the Worldwide Science database were searched from their inception to 31 January 2023.

Methods: Data were extracted using a standardised data extraction format prepared in Microsoft Excel. The inverse variance (I2) test was used to evaluate the presence of heterogeneity across the included studies. To identify the possible source of heterogeneity, subgroup analysis was carried out. Funnel plot symmetry, Begg's and Egger's tests were used to evaluate the existence of publication bias. In addition, factors associated with VDD among patients with T2DM were examined. All statistical analyses were carried out with STATA V.14 software.

Results: A total of 54 studies with 38 016 study participants were included in the study. The pooled prevalence of VDD among patients with T2DM was found to be 64.2% (95% CI 60.6% to 67.8%) with a substantial level of heterogeneity (I2=98.2%; p<0.001). Results of the subgroup analysis indicated that the pooled prevalence of VDD among patients with T2DM was highest (70.9%) in African nations and lowest (57.1%) in Middle East countries. Being female (pooled OR (POR) 1.60, 95% CI 1.29 to 1.97), having poor glycaemic control (POR 2.50; 95% CI 1.74 to 3.59), hypertension (POR 1.21; 95% CI 1.08 to 1.36), obesity (body mass index ≥25) (POR 1.68; 95% CI 1.16 to 2.44), dyslipidaemia (POR 2.54, 95% CI 1.37 to 4.73), albuminuria (POR 2.22, 95% CI 1.71 to 2.95), nephropathy (POR 1.58; 95% CI 1.08 to 2.31) and retinopathy (POR 1.48: 95% CI 1.17 to 1.89) were predictors of VDD among patients with T2DM.

Conclusions: More than half of patients with T2DM were suffering from VDD. Being female, having poor glycaemic control, hypertension, obesity, dyslipidaemia, albuminuria, nephropathy and retinopathy were the predictors of VDD among patients with T2DM.
 Download the PDF from VitaminDWiki

---

VitaminDWiki – Overview Diabetes and vitamin D contains

• Diabetes is 5X more frequent far from the equator
• Children getting 2,000 IU of vitamin D are 8X less likely to get Type 1 diabetes
• Obese people get less sun / Vitamin D - and also vitamin D gets lost in fat
• Sedentary people get less sun / Vitamin D
• Worldwide Diabetes increase has been concurrent with vitamin D decrease and air conditioning
• Elderly get 4X less vitamin D from the same amount of sun
      Elderly also spend less time outdoors and have more clothes on
• All items in category Diabetes and Vitamin D 530 items: both Type 1 and Type 2

Vitamin D appears to both prevent and treat diabetes

• Appears that >2,000 IU will Prevent
• Appears that >4,000 IU will Treat , but not cure
• 90% less T2 Diabetes in the group having lots of Vitamin D
• Appears that Magnesium helps both Prevention and Treatment
• Many diabetics would be better treated if Gut-Friendly Vitamin D were used

Number of articles in both categories of Diabetes and:
'This list is automatically updated''

• Dark Skin 24;   Intervention 56;   Meta-analysis 38;   Obesity 35;  Pregnancy 43;   T1 (child) 39;  Omega-3 11;  Vitamin D Receptor 24;  Genetics 12;  Magnesium 27    Click here to see details

Some Diabetes studies

• Type 2 Diabetes treated by Vitamin D (often 50,000 IU weekly) – meta-analysis July 2023
• Diabetic inflammation synergistically decreased by Vitamin D and exercise – RCT June 2022
• Incidence of Type-2 Diabetes increased 3X in 30 years (by the way, Vitamin D helps) – July 2022
• Vitamin d treats Type II Diabetes in many ways (14 article review) - Sept 2021
• T2 Diabetes 30 percent more likely if poor Vitamin D Receptor – meta-analysis of 47 studies – July 2021
• Diabetes helped somewhat by weekly 50,000 IU of vitamin D (5 ways to improve) – RCT Aug 2021

50 ng of Vitamin D fights Diabetes

• Saudi study defines normal Vitamin D level to be 50 to 70 ng (diabetes, etc.) - June 2020
• Diabetes 5X less likely if more than 50 ng of Vitamin D – April 2018

T1 Diabetes

• T1 Diabetes 3X lower risk if high vitamin D (over 40 ng) – Meta-analysis Nov 2020
• Type 1 Diabetes is prevented and treated by Vitamin D – review of 16 studies – Sept 2019
• Type 1 Diabetes prevention with Vitamin D and Omega-3 – Symposium April 2019

Pre-Diabetes

• 4X reduction in prediabetes progressing to T2D if more than 50 ng of vitamin D – RCT March 2023
• Prediabetes reduced by weekly 60,000 IU of Vitamin D – RCT Jan 2021
• Prediabetes 1.5 X more likely to go away if take Vitamin D – meta-analysis July 2020

Diabetes, Metabolic Syndrome and Magnesium - many studies

---

VitaminDWiki - 38 Meta-analyses of Diabetes

This list is automatically updated

---

VitaminDWiki - 50,000 IU Vitamin D weekly is often recommended 200+ studies

---

Study is reported on by GrassrootsHealth