Many studies that track healthy people for years have reached the same conclusion: “People with higher levels of vitamin D have a lower risk of developing type 2 diabetes in the future,” says Tufts Medical Center’s Anastassios Pittas, who is also a professor of medicine at Tufts University’s Sackler School of Graduate Biomedical Sciences.24
But those studies can’t tell if something else about people with low vitamin D increases their risk. So researchers have looked further.
“We and others have done short term intervention studies looking at insulin sensitivity, insulin secretion, or similar out comes,” says Pittas. “Some have not shown any difference, but others show promise.”