Abstract Title:

Effects of vitamin D on serum lipid profile in patients with type 2 diabetes: A meta-analysis of randomized controlled trials.

Abstract Source:

Clin Nutr. 2016 Mar 15. Epub 2016 Mar 15. PMID: 27020528

Abstract Author(s):

Tina Jafari, Aziz A Fallah, Afshin Barani

Article Affiliation:

Tina Jafari


BACKGROUND & AIMS: The effect of vitamin D on lipid profile in type 2 diabetic patients is controversial. This meta-analysis aimed to assess the effect of vitamin D on serum total cholesterol (TC), triglycerides (TG), low-density lipoproteins (LDL), and high-density lipoproteins (HDL) of these patients to elucidate the subject.

METHODS: Seven databases were searched and randomized controlled trials (RCTs) assessed the effect of vitamin D on lipid profile published until November 2015 were identified. Un-standardized mean difference and its corresponding 95% confidence interval (CI) was calculated from the effect sizes by using random effects model.

RESULTS: We found 2220 articles in our systematic search, after exclusion of un-related studies we enrolled 17 studies comparing intervention group (received vitamin D) with control group (received placebo) in the meta-analysis. Vitamin D significantly reduced serum TC (-3.74 mg/dl, 95% CI: -7.13 to -0.34, P = 0.031), but serum TG did not show significant reduction (-4.90 mg/dl, 95% CI: -15.11-5.31, P = 0.347). Results confirmed the significant lowering effect of vitamin D on LDL in patients with T2D (-2.55 mg/dl, 95% CI: -4.83 to -0.26, P = 0.029), but change in serum HDL was negligible (-0.72 mg/dl, 95% CI: -1.27 to -0.17, P = 0.010). Subgroup analyses showed that the baseline serum 25-hydroxy vitamin D of patients, vitamin D dosage, intervention duration, and the method of vitamin D application influence the effect of vitamin D on lipid markers.

CONCLUSION: This study demonstrated that vitamin D improved serum levels of TC, TG, and LDL in patients with T2D but changes of serum HDL was not satisfactory.

Study Type : Meta Analysis

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Sayer Ji
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