Study : Low levels of vitamin D may increase the risk of cardiovascular disease . About 40 to 50 % of people do n't get enough vitamin D says study author . Vitamin D appears to regulate insulin production in the pancreas , and a deficiency could raise diabetes risk . Sun in northern U.S. may not generate enough vitamin D during winter months . More research needed to pinpoint role of vitamin D and cardiovascular disease .
Study : Low levels of vitamin D may increase the risk of cardiovascular disease . About 40 to 50 % of people do n't get enough vitamin D says study author . Sun in northern U.S. may not generate enough vitamin D during winter months . More research needed to pinpoint role of vitamin D and cardiovascular disease .