Vitamin D: Why You Need It and How to Get Enough
Vitamin D is often called the sunshine vitamin because your body produces it when your skin is exposed to sunlight. Yet vitamin D deficiency is one of the most common nutrient deficiencies worldwide, affecting an estimated one billion people. This matters because vitamin D plays a crucial role in calcium absorption, bone health, immune function, and even mood regulation. People who live in northern latitudes, spend most of their time indoors, have darker skin, or are older are at higher risk. Symptoms of deficiency can be subtle and include fatigue, bone pain, muscle weakness, and frequent illness. Fatty fish like salmon and mackerel are the best dietary sources. Egg yolks, fortified milk, and some mushrooms also provide small amounts. For those who cannot get enough from sun and food, supplementation is effective and inexpensive. Have your levels tested before starting high-dose supplements.
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