In a recent analysis by, some had up to 80% more than the labeled amount. High blood levels of vitamin D can increase risk for heart and kidney diseases and even death. At appropriate levels, vitamin D can reduce the risk for cardiovascular disease, diabetes, osteoporosis and Alzheimer’s. Among the vitamin D products that passed recent tests: Simply Right (Sam’s Club), 2000 IU…Spring Valley (Wal-Mart) and Rexall, both 1,000 IU.