Vitamin D tests involve taking a blood sample to measure the vitamin D levels in your bloodstream. There are two forms of vitamin D in the blood: 25-hydroxy vitamin D, or calcidiol, and 1,25-dihydroxy ...

At-home vitamin D tests may provide insights into your health. When followed by a consultation with a doctor, it can be a first step in managing a common nutritional deficiency. Vitamin D helps you ...

Are we overdoing it with vitamin D tests and supplements? Katie Ward, DNP, discusses recent findings that suggest that natural sunlight and a balanced diet might just be enough to satisfy our vitamin ...

The nation's largest medical lab company says it recently discovered and fixed a problem that led to inaccuracies in a small number of tests for vitamin D deficiency. Subscribe to read this story ...

Vitamin D testing has exponentially increased in recent years [1]. The definition and relevance of vitamin D deficiency are still under debate. Recent large observational data have suggested that ~40% ...

ORLANDO, Florida — Inappropriate orders for the 1,25-dihydroxy vitamin D test have been increasing in recent years, according to the authors of a paper being presented at the College of American ...