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 ...

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 ...

As the saying goes, prevention is better than cure; regular health check-ups and tests can possibly help to detect serious ...

OU Health's Dr. Catherine Mims explains why vitamin D is critical for bone, brain, and immune health, and how to safely maintain healthy levels year-round.

For instance, traditional guidelines state that vitamin D levels should be at least 20 nanograms per milliliter (ng/mL). (A blood test measures a form of the vitamin known as 25-hydroxyvitamin D.) ...

Tears and saliva may offer new ways to monitor blood glucose and vitamin D levels, suggesting less invasive methods for managing chronic health conditions.

Researchers pulled information including medical records and death certificates, vitamin D blood levels at baseline and whether or not the participants took a vitamin D supplement.

Despite its ground-breaking findings, overdose of Vitamin D can cause hypercalcemia leading to nausea, kidney issues, or ...

Vitamin D is sometimes nicknamed the “sunshine vitamin” because your skin makes it when you’re out in the sun. You can also get small amounts from foods like fatty fish, egg yolks, and fortified milk ...

Taking a dose of 3,320 International Units (IU) of vitamin D per day was associated with benefits such as blood pressure, cholesterol, and fasting blood glucose, according to a meta-study.