(HealthDayNews) -- Magnesium is a mineral that's important to every cell of your body, the U.S. National Institutes of Health says.
Magnesium is needed for more than 300 biochemical reactions that keep you healthy. It helps maintain normal muscle and nerve function, keeps heart rhythm steady, and helps maintain strong bones.
The mineral is present in many foods, but usually is found in small amounts. Green vegetables such as spinach are excellent sources, as are nuts, seeds and some whole grains.
