In another randomized and controlled clinical trial, a joint team of researchers from the University Hospitals of Frankfurt and Hanover examined the effects of vitamin D administration on diabetes progression. The results of this clinical study showed that vitamin D supplementation significantly reduced insulin demands and significantly improved long-term blood glucose levels (HbA1c). No side effects were observed. Further details can be found in the study.
James L Vacek, Subba Reddy Vanga, Mathew Good, Sue Min Lai, Dhanunjaya Lakkireddy, Patricia A Howard