Features the unique, patented, chelated mineral Magtein®, which contains magnesium that is chelated to threonic acid (magnesium L-threonate). This highly bioavailable form of magnesium is formulated to promote brain concentrations of magnesium.* Magnesium L-threonate is an ionophore, which has the ability to transport magnesium ions across lipid membranes, including those of brain cells. Magtein® is superior to other forms of magnesium at entering through the blood-brain barrier.* This product is designed to support cognitive function, memory, and overall brain health.*