Magnesium, potassium, or sodium? Learn what each electrolyte does, signs of low levels, and when a supplement may help.

Magnesium is a mineral that your body doesn't produce naturally—you can only get it through food or supplements. And it's important to get enough, because magnesium is essential for proper bodily ...

Magnesium is a mineral available in supplement form. Other supplements and drugs you might be taking, however, won't always interact well with it, experts say.