Magnesium Glycinate delivers 275mg of elemental magnesium, 65% of the daily value, from 2,500mg of magnesium bound to glycine. That chelated form is the reason this one is worth taking. 

Hard training raises what your body asks of magnesium, and most athletes come up short on it. This one is built for the end of the day: three capsules, unflavored, one active ingredient, taken to support the sleep your training actually adapts during. Strength is built in recovery, and recovery is built in sleep.*