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Vitamin D is one of the most widely used dietary supplements in the world, but many people are unsure about the best time of day to take it.

Experts say the most important factor when taking vitamin D isn’t the time of day—but how you take it.

Vitamin D deficiency was significantly associated with increased obstructive sleep apnea (OSA) severity among children, according to a cross-sectional study. In a multivariable analysis of kids who ...

Vitamin D deficiency is common in children with severe obstructive sleep apnea (OSA) and is associated with increased OSA severity. Lower serum 25-hydroxyvitamin D levels correlate with higher ...

We’re nearing the end of what’s been a long winter for people in many parts of the United States. In the middle and northern regions of the U.S., where winter brings not only cold but limited sun, ...

A recent study of elderly men found no evidence that obstructive sleep apnea (OSA) increased in severity (or prevalence) as a result of vitamin D deficiency. The research, published online ahead of ...