1. Sleeping through the night, regardless of how you feel otherwise, is a great benefit. 2. Salt is anti-diuretic, so I'd suspect the effect is real, but not sp

1. Sleeping through the night, regardless of how you feel otherwise, is a great benefit. 2. Salt is anti-diuretic, so I'd suspect the effect is real, but not specific to magnesium. And like any supplement, it works for you because you presumably weren't already getting enough in your diet, so.. ymmv.