Neumag™ Sport 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 optimal concentrations of magnesium . Magnesium L-threonate is an ionophore, which has the ability to transport magnesium ions across lipid membranes. This product is designed to support normal muscle function, electrolyte balance, and energy metabolism.