Average Vitamin D Levels by Age Group The 25-hydroxy vitamin D blood test can determine vitamin D levels. The results may be reported in nanograms per milliliter (ng/mL) or nanomoles per liter ...

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.

Too little vitamin D is tricky to spot, a registered dietitian nutritionist told The Post. She shared some signs of vitamin D deficiency and how to know if you should be taking a supplement.

1. Vitamin D is crucial for maintaining immune function, which is particularly important as we enter the cold and flu season.

How? Its ultraviolet-B rays hit precursor vitamin D in your skin cells, providing the energy needed for your body to synthesize vitamin D2/3.

The only way to get an official answer on whether your vitamin D levels are too low is through a blood test, but the symptoms include fatigue, muscle pain, and general weakness.

Vitamin D is vital for numerous bodily functions. While sunlight is the primary source of vitamin D, record high temperatures this summer may dissuade people from spending time in the sun. An expert ...

How Vitamin D Levels May Influence Psoriasis Severity Previously, research on the connection between vitamin D levels and psoriasis severity was limited.

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.