Neumag Sport from Designs For 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. The Designs For Sport Neumag Sport product is designed to support normal muscle function, electrolyte balance, and energy metabolism.