High-Dose Vitamin D Lowers Diabetes Risk in Some People

Nearly 115 million Americans are on the road to diabetes. New research suggests an inexpensive, widely available supplement could slow that journey, but only for some of them. A genetic quirk in roughly 70 percent of prediabetic adults may determine whether high-dose vitamin D can meaningfully lower their risk of developing Type 2 diabetes, according to a study published in JAMA Network Open. The research builds on the D2d trial. More than 2,000 U.S. adults living with prediabetes were randomized to either take 4,000 units of vitamin D or a placebo for up to 3.5 years. Initially, the trial did...