This convenient powder contains bioavailable magnesium bisglycinate chelate from KlaireLabs. Highly absorbable and unusually well-tolerated. this chelated form of magnesium rarely causes gastrointestinal side effects often seen with other forms of magnesium when supplemented in higher amounts. Magnesium Glycinate Powder mixes easily in water or juice and dissolves rapidly and completely. No flavors or sweeteners are added.