
Heart & Circulation - Vitamins D and K support healthy heart and circulation
Vitamin D low in sleep apnea When the upper respiratory tract is partly or fully blocked during sleep, and breathing becomes shallow, excessive carbon dioxide can build up in the bloodstream, altogether a condition called obstructive sleep apnea (OSA). Here, doctors reviewed 29 OSA studies, covering 6,717 participants. Overall, those with moderate to severe OSA had significantly lower vitamin D levels compared to similar, but healthy study participants. OSA was most common in