For the past 2 days, I've been drinking magnesium water (ionic magnesium), and each time, my muscles felt like they turned to jelly. I had to cut a workout short yesterday because of this. I don't usually experience this kind of muscle relaxation unless I take an epsom salts bath, and I have been attributing the reaction to the hot water as much as the magnesium. I don't react this way to magnesium supplements or magnesium in my food (about 325-350 from food each day).

I know that magnesium is a muscle relaxant, but my degree of relaxation is strong. Am I just on the far end of some bell curve? Is it possible that I just don't absorb Mg well from food or supplements? Or Is this reaction a danger sign of something else?