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AfriGeneas Health and Wellness Forum

Vitamin D and Sleepiness

Vitamin D Plays Unexpected Role in Sleepiness in African Americans

The Gist

Sleepiness affects us all at times, but scientists are now showing that there is a direct relationship with vitamin D—and for African Americans, higher vitamin D is correlated with more sleepiness, which is the opposite of the relationship found in other groups. The study in question, which appears in the December 15th issue of the Journal of Clinical Sleep Medicine, was conducted in Illinois and looked at sleep problems of 81 patients. The study raises new questions about the role of race, sleep, and vitamin D, as researchers have long asserted that more vitamin D means better sleep. The pigmentation found in different races may play a role in how the vitamin affects sleep, say the researchers.
The Expert Take

"What this study primarily does is start the conversation about another aspect of health and disease, namely the symptom of daytime sleepiness and other sleep disorders that may somehow be related to deficiency of Vitamin D," lead investigator Dr. David E. McCarty tells Healthline. "Many questions remain and much work needs to be done."

As a starting point, the findings from the study have implications for how physicians respond to complaints of sleepiness from African American patients. The question of how vitamin D affects sleep is now a concern.

"It will take further research to determine whether widespread screening for vitamin D deficiency in patients with sleep-related complaints is a valid recommendation or if supplementation of vitamin D deficiency provides incremental benefits in patients presenting with sleep-related complaints," says McCarty.


18 Dec 2002 :: 14 Nov 2008
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