Vitamin D tests certified by the U.S. Centers for Disease Control and Prevention (CDC) Clinical Standardization Programs (CSP) are well calibrated overall, according to a new study presented Sunday at ...

Sometimes it may feel like almost every visit to the doctor includes a dreaded blood draw. Blood tests can reveal a lot about the state of your health. But whether you should get a specific test (and ...

How to use an at-home vitamin deficiency test For any further questions, all reputable at-home tests will have instructions and a customer care line. Most vitamin deficiency tests require a blood ...

In a small but revealing study, scientists discovered that tears strongly mirror blood glucose and saliva may reflect vitamin D status. This could lead to less invasive ways to monitor chronic health.

Vitamin D, the sunshine vitamin, is crucial for bones, muscles, mood, and immunity. While essential, excessive intake from ...

For a while vitamin D was looking like a bona fide health elixir. It was recognized a century ago as the cure for rickets, a childhood disease that causes weak and deformed bones. Then, in the early ...

Two new lab tests to measure blood levels of vitamin D are inaccurate more than 40% of the time, according to a new study. Researchers say newer tests tend to overestimate the number of people who are ...

Take vitamin D supplements only under medical guidance, follow prescribed doses, and get regular blood tests to monitor vitamin D and calcium levels.

There is nothing quite like enjoying some fun in the sun to provide your body with some much-needed vitamin D.

When exposed to sunlight, your body manufactures vitamin D using a type of cholesterol. (Yes, even a certain amount of cholesterol is necessary for good health!) This is why vitamin D is often ...