Research examines vitamin D levels, daytime sleepiness

12/17/2012 | HealthDay News

Progressively lower vitamin D blood levels were associated with progressively higher levels of daytime sleepiness among those with normal vitamin D levels, according to a study in the Journal of Clinical Sleep Medicine. However, researchers noted higher vitamin D levels were linked to greater prevalence of daytime sleepiness among black patients who were deficient in the vitamin.

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