When we have a tiny person inside of us, there is a small chance they will be magnesium deficient but before that happens they will literally rob you of all of your magnesium (were they not satisfied with the sleep and normal bowel movements they already took from you?).
Magnesium is a necessary element needed for the body to function. Each and every cell in your body uses magnesium to create adenosine triphosiphate (ATP) which is ~energy~ stored and created in the body.