NSF GMP CERTIFIED: Bestvite’s facility is NSF/ANSI 455-2 Dietary Supplements Good Manufacturing Practice (GMP) certified. Earning GMP certification from NSF verifies that a manufacturing facility has the proper methods, equipment, facilities, and controls in place to produce dietary supplement products. BESTVITE GUARANTEE: All Bestvite products are manufactured in the USA according to GMP. The raw materials and all batches of the finished Magnesium Glycinate product are tested by a 3rd party laboratory for purity and potency. PURE FORMULA: This Magnesium Glycinate product contains no stearates, is non-GMO, gluten-free, vegan, and in an additive-free capsule. The 3 capsule serving yields 400 mg of elemental magnesium. NUTRIENT METABOLISM & OVERALL SUPPORT: Magnesium can help with the metabolism and utilization of many essential nutrients. It can also play a role in headaches, sleep, muscle cramps, and more.*. HEART & BONE HEALTH: Magnesium activates the enzymes necessary for many physiological functions that may include cardiac function, muscle contraction, and the body’s stress-response system.*.