Are you getting enough sleep, eating well, and exercising regularly, yet you still feel tired? Well, it could be a sign that your vitamin D levels are low. Feeling low energy (like you’re physically and mentally dragging) is a frequently cited complaint among those with a poor vitamin D status. About 29% of U.S. adults1 are deficient in vitamin D (aka have blood levels less than 20 ng/mL, and 41% of adults1 have insufficient vitamin D levels (less than 30 ng/mL). So there’s a decent chance you fall into one of these categories.
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