What is the serving size of the Magnesium Glycinate High Absorption 500mg 90 Caps and how much magnesium is in each serving?

The serving size of Magnesium Glycinate High Absorption 500mg 90 Caps is 2 capsules. Each serving contains 1000 mg worth of powder, of which 250 mg is magnesium, with the rest remaining being magnesium glycinate.