Editor’s note: This spray is now back in stock in both sizes, so we’ve updated the links below accordingly. I have been a terrible sleeper ever since I had kids. My 8-year-old asked me if I stay awake ...

Magnesium is one of the major minerals your body needs to function properly. You get it from foods and supplements. It's also an ingredient in some medicines such as antacids and laxatives. More than ...