vitamin D

New research shows that progressively higher levels of daytime sleepiness were inversely correlated with progressively lower levels of vitamin D, especially in African-Americans. The research team said the findings are the first to demonstrate a significant relationship between sleepiness and vitamin D.

Treatment with vitamin D reduced the size of uterine fibroids in laboratory rats predisposed to developing the benign tumors, reported researchers funded by the National Institutes of Health.

The winter blues affects millions of people throughout the United States and Canada each year. This period of mental and physical malaise, often diagnosed as seasonal affective disorder, drives many people to search for ways to overcome the condition.

In the midst of the cold winter months, a burst of sunshine is a welcome sight. When most days are gray, it’s hard to remember that the sun is still there in the sky—it hardly pierces through the gray curtain of clouds that seems to seal in cold air. The apparent absence of sunlight can drive even the most chipper of people into a mental funk.