Doctor's Best High Absorption 100% Chelated Magnesium provides 200mg of elemental magnesium per serve and is made with TRAACS®, a patented form of magnesium that is chelated to the amino acids glycinate/lysinate to optimize bioavailability. Magnesium is an essential mineral for human nutrition and is required for more than 300 biochemical reactions in the body. Magnesium supports normal muscle and nerve function and offers cardiovascular support. It also supports a healthy immune system and supports bone density. Magnesium also supports normal blood pressure, balanced blood sugar levels and may support sleep. Magnesium oxide is a frequently used supplement however it shows poor solubility.