Magnesium Glycinate Chelate (formerly Magnesium Glycinate Chelate) is one of the best absorbed forms of magnesium. Each capsule provides 150 mg of elemental magnesium. This product should not cause any of the unfavorable gastrointestinal symptoms associated with magnesium supplementation due to the very stable chelate formed between two glycine molecules and each magnesium ion via a patented process.