SUPPORTS BONE HEALTH: NOW Calcium & Magnesium Citrate Powder with Vitamin D3 is an optimal bone structure support formula designed by NOW's certified nutritionists.It contains key nutrients that play essential roles in bone metabolism.CITRATE POWDER WITH VITAMIN D3/1:1 MINERAL RATIO/ENHANCED MIXABILITY: The citrate forms of calcium and magnesium are highly absorbable and support not only strong bones and teeth but muscle and nerve function as well.Vitamin D3 is included to complement calcium and magnesium and its role in the maintenance of mineral homeostasis and bone structure.CERTIFICATIONS/CLASSIFICATIONS: Non-GMO, Kosher, Dairy Free, Egg Free, Low Sodium, Made without Gluten, Soy Free, Sugar Free.GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).NOW Calcium & Magnesium Citrate Powder with Vitamin D3 is an optimal bone structure support formula designed by NOW's certified nutritionists. It contains key nutrients that play essential roles in bone metabolism.The citrate forms of calcium and magnesium are highly absorbable and support not only strong bones and teeth but muscle and nerve function as well.Vitamin D3 is included to complement calcium and magnesium and its role in the maintenance of mineral homeostasis and bone structure.Mix 1 1⁄2 level teaspoons of powder into at least 8 oz. of cold water or clear liquid. Add powder slowly while stirring. Take once daily with a meal. Pure calcium and magnesium citrate powders can increase the temperature of liquids upon contact; therefore, the recommended serving MUST be mixed into at least 8 oz. of cold liquid to neutralize this reaction prior to ingestion.