@faithfuldoc: Less than 1% of your body's magnesium is in your blood, so a standard test can easily miss when you're running low. Instead, it tends to show up as muscle cramps, constant fatigue, restless sleep or that wired but tired feeling. Not every magnesium supplement is built the same, though. Here's what I look for. #magnesium #sleep #supplements #womenshealth #microingredients