3rd Party Lab Tested for Purity & Quality. ¼ Teaspoon (750 mg) of Magnesium Glycinate per Serving, 605 Servings per bottle . Non-GMO & Gluten-Free. Proudly Made in USA, GMP Compliant, FDA Registered Facility. No Artificial Color, Flavor, or Sweetener, No Preservatives, No Sugar, No Milk, No Corn, No Soy, No Egg, No Lactose, No Gluten, No Wheat, No Yeast, No Fish. Sodium Free.