I've been taking it before bed most nights for sleep. There was a noticeable difference at first, but over time it became less drastic (maybe I was slightly deficient before and am now up to level? Just guessing). The effect seems more obvious if I don't take it for a few nights and then start again; could very well be a placebo, but I whatever works I guess.
100% this is what I experienced .. I was fine for months after taking the supplement then I went away for holiday, forgot my supplement and the leg cramps at night came back after sometime. When i came home, i started taking it again and the cramps were gone. Just from that experience, it confirmed to me that magnesium deficiency was the root cause.
