Now Magtein , Magnesium L-Threonate

NOW Magtein® (Magnesium L-Threonate) provides a highly bioavailable form of magnesium designed to support cognitive function, memory, and a calm mood. A 3-capsule serving contains 2,000 mg of Magtein® (yielding 144 mg of elemental magnesium), with 0 calories and 0 fat. It is a vegetarian-friendly supplement aimed at crossing the blood-brain barrier