12 Signs of Vitamin D Deficiency Most People Miss

8. Sleepiness

In one 2012 study published in the Journal of Clinical Sleep Medicine, lower levels of vitamin D were linked to higher levels of daytime sleepiness.

9. Periodontal Disease

Those suffering from this chronic gum disease that causes swelling and bleeding gums should consider raising their vitamin D levels to produce defensins and cathelicidin, compounds that contain microbial properties and lower the number of bacteria in the mouth.

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