LOL perhaps I did use an unfortunate choice of words there...what I really meant was that you're not going to overdose on Mg by taking the normal supplemental amount. You can overdose on water if you drink enough of it (and it's not really that much). But if you're taking more than your body really needs, it will flush the excess. What I'm saying is that you shouldn't really worry about long term toxicity from taking a magnesium supplement.