Signs You Could Be Deficient in Vitamin D (and Feeling Blah)

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Getting sick often

Vitamin D receptors can be found in almost all our organs and tissues, which shows what a great influence this nutrient has on our metabolism and proper body function.

It's also responsible for supporting immune system health and keeping it in tip-top shape, so if you're frequently fighting off infections like the cold or flu, you may not be getting enough vitamin D.