Nutricost's Magnesium Bisglycinate contains 210mg of magnesium per serving. Each fruit punch flavored bottle contains 250 grams for 71 servings of magnesium (3.5g per serving). Nutricost, located and headquartered in the USA, only uses the best ingredients to ensure maximum quality and to help you feel your best! By keeping our supplement recipes simple and clean, you get the best experience possible with Nutricost. Our supplements are manufactured in a GMP-compliant and FDA-registered facility; and each batch of every product is tested by independent, ISO-accredited laboratories.