How does magnesium supplements help with better sleep? What's the science of it? And what are the other benifets?

Treats deficiency. I'm not sure magnesium will help someone sleep if they have sufficient magnesium, but only 32% of americans get adequate magnesium in their diets. Magnesium deficiency is widespread not only due to lack in diet but alcohol. Stress ; many drugs cause magnesium depletion. Low magnesium causes insomnia, anxiety, fatigue, muscle spasms, high blood pressure, headaches etc. See http://bit.Ly/1dpai09.