Studies related to HbA1c and Vitamin D

Effects Of Vitamin D And Calcium Supplementation On Pancreatic β Cell Function, Insulin Sensitivity, And Glycemia In Adults At High Risk Of Diabetes: The Calcium And Vitamin D For Diabetes Mellitus (CaDDM) Randomized Controlled Trial

There was an improvement in insulin secretion seen following Vitamin D supplementation in adults at risk for type II diabetes, with the reduction in HbA1c not reaching statistical significance and being very small in magnitude.