Insulin Resistance in Adults with Type 1 Diabetes is Associated with Lower Vitamin D Serum Concentration

Aim Type 1 diabetes mellitus (T1DM) is a disease characterized by an absolute deficiency of endogenous insulin secretion. Insulin resistance (IR) may develop among patients with T1DM. Vitamin D deficiency was reported to be a risk factor in the development of IR. The aim of the study was to assess the relationship between serum concentrations of 25-hydroxyvitamin D (25(OH)D) and IR among patients with T1DM. Methods The test group consisted of 110 adult patients [males=65 (59%)] with T1DM. Participants were recruited in Poland between 1st October and 30th April in 2015/2016 and 2016/2017. VD serum level was assessed by ELISA array. IR was assessed by estimated Glucose Disposal Rate (eGDR). Results In the study group 21 (19%) patients were recognized as IR according to eGDR cut-offs ( Conclusion The serum concentration of Vitamin D is negatively associated with insulin resistance in patients with T1DM and may have clinical implications.