3rd Party Lab Tested for Purity & Quality. 425 mg of Magnesium per Vegetarian Capsule - 180 Capsules 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.