Here's the last installment of the Dietary Guidelines Nutrients of Concern series. Since the guidelines advise people to "Choose foods that provide more potassium, dietary fiber, calcium, and vitamin D, which are nutrients of concern in American diets," we've focused on discussing one of these nutrients per week. This week, we're going to talk about vitamin D...

Most Americans simply aren’t getting enough of certain vital nutrients, including calcium, dietary fiber, potassium, and vitamin D. Let's start with a closer look at calcium -- what it is, where to get it, what your body does with it, and what happens when you don't get enough...

The researchers concluded that high-dose Vitamin D3 therapy did modestly increase calcium absorption, but the effect was small and it did not translate into measurable beneficial effects on BMD, muscle function, muscle mass, or falls or fractures after one year.

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