Calcium and the Dietary Guidelines for Americans

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...

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Stephanie Ronco Stephanie Ronco

Scientific Facts About Sleep

Lack of sleep is linked to motor vehicle crashes, industrial disasters, and medical errors, among many other serious consequences. But why is sleep important? And what is its impact on health?

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