Now Magnesium Oxide Pure Powder supports energy production, nervous system, muscle contraction, nerve impulse transmission and bone mineralization. Also supports fatty acid synthesis, protein synthesis, and glucose metabolism. Recommended Use: Mix 1/4 level teaspoon of powder into at least 6 oz. of cold water or clear liquid. Take once daily with a meal, or as directed by a healthcare professional. Pure Magnesium Oxide Powder can increase the temperature of liquids upon contact; therefore, the recommended serving MUST be mixed into at least 6 oz. of cold liquid to neutralize this reaction prior to ingestion. Store in a cool, dry place after opening.