Vitamin d dosing trial aims to stop prediabetes from becoming diabetes

This study tests whether taking weekly vitamin D supplements, with doses adjusted to reach a target blood level, can help control blood sugar in 100 adults aged 30-74 who have prediabetes (high risk for type 2 diabetes). Participants are randomly assigned to receive vitamin D or a placebo for about 18 months. The main goal is to see if vitamin D increases the time blood sugar stays in a healthy range, potentially preventing diabetes.