Conclusions This meta‐ analysis provides level 1 evidence that vitamin D supplementation may reduce chronic low‐ grade inflammation in patients with type 2 diabetes .
Background Vitamin D has been proposed to have anti‐inflammatory properties ; however , the effect of vitamin D supplementation on inflammation in type 2 diabetes has not been established .
Objective The aim of this systematic review and meta‐ analysis was to examine the effect of vitamin D supplementation on inflammatory markers in patients with type 2 diabetes and to identify relevant gaps in knowledge .
Lack of effect of subtherapeutic vitamin D treatment on glycemic and lipid parameters in Type 2 diabetes: A pilot prospective randomized trial.
BACKGROUND Epidemiological studies suggest a higher prevalence of metabolic syndrome and its components among individuals with vitamin D deficiency . The aim of the present study was to determine whether vitamin D treatment  improves glucose control and insulin sensitivity in Type 2 diabetes mellitus ( T2DM ) . METHODS Subjects with T2DM and serum 25-hydroxyvitamin D ( 25(OH)D ) concentrations < 25 ng/mL were r and omized to receive 400 IU ( Group 1 ) or 1200 IU ( Group 2 ) cholecalciferol for 4 months . Fasting plasma glucose , glycosylated hemoglobin ( HbA1c ) , Quantitative Insulin Sensitivity Check Index ( QUICKI ) , serum lipid levels and serum adiponectin were measured at baseline and at 4 months . RESULTS Mean 25(OH)D levels increased in both groups ( from 17.6±1.5 to 25.5±1.8 ng/mL in Group 1 and from 15.6±1.4 to 27.4±2.4 ng/mL in Group 2 ; P≤0.001 vs baseline for each group ) . No significant differences were noted in fasting plasma glucose , HbA1c , QUICKI , serum adiponectin , and lipid levels compared with baseline within groups or between the two groups . CONCLUSIONS In the present pilot study , conventional vitamin D treatment at a level improving , but not optimizing , serum 25(OH)D did not improve glycemia , insulin sensitivity , or lipid profile . However , diabetes and lipids were relatively well controlled at baseline . Future studies should be design ed to achieve optimal concentrations of serum 25(OH)D ( at least > 32 ng/mL ) and should include subjects showing more abnormal parameters of glycemia , lipid , and insulin sensitivity at baseline
Conclusions This meta‐ analysis provides level 1 evidence that vitamin D supplementation may reduce chronic low‐ grade inflammation in patients with type 2 diabetes .
Background Vitamin D has been proposed to have anti‐inflammatory properties ; however , the effect of vitamin D supplementation on inflammation in type 2 diabetes has not been established .
Objective The aim of this systematic review and meta‐ analysis was to examine the effect of vitamin D supplementation on inflammatory markers in patients with type 2 diabetes and to identify relevant gaps in knowledge .