A vitamin D test measures your blood's vitamin D levels to see if they are too high or too low. Low vitamin D levels can increase your risk of bone disease and other severe conditions. Your vitamin D ...

Vitamin D is essential for many bodily processes, particularly the development of healthy bones. A 25-hydroxy vitamin D test can reveal whether the vitamin D levels in a person’s blood are within a ...

Swiss-based Roche announced this month that it has received U.S. regulatory clearance for a less-complex vitamin D test in the United States, which the company said opens the door to more efficient ...