NEWYou can now listen to Fox News articles! High-dose vitamin D supplements could help reduce diabetes risk among certain groups, according to new research from Tufts University.In a large clinical trial, researchers performed genetic testing of more than 2,000 U.S. adults with prediabetes after they received 4,000 units per day of vitamin D supplements, then compared them to a placebo group.An earlier study showed no significant reduction in diabetes risk in the group receiving vitamin D supplementation, but when the researchers looked closer, they found a benefit for certain genetic groups. For the new study, the Tufts researchers compared participants…