Vitamin D Vitamin D is a nutrient that plays a vital role in bone health, as it helps the body absorb the calcium that's coming in. However, this vitamin is more than just calcium's assistant; it's also important on its own for proper muscle and nerve function. According to the National Institutes of Health, "vitamin D deficiency leads to osteomalacia, causing bone pain and muscle weakness."
Luckily, it's not hard to boost your intake: Considine says that the vitamin "can be found in mushrooms or even just thirty minutes of daily sun exposure." And if lots of sun (or mushrooms) aren't for you, you can always go the supplement route. "I often recommend a vitamin D3 supplement," says Cassetty, explaining that it can be difficult to find naturally in many foods. Hum Nutrition has the Here Comes the Sun Vitamin D Supplement, $20, if you're looking for a popular option.
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