NOW Sports Waxy Maize is a complex starch derived from non-GMO corn that consists of 90% amylopectin, a high molecular weight, multi-branched polysaccharide. Due to its complex structure, amylopectin is slowly absorbed by the body; but once absorbed, it is easily assimilated by muscle tissue and converted into glycogen. Glycogen is a stored carbohydrate that serves as a sustained pool of glucose that the body readily uses for energy production during exercise. Waxy maize also supports glycogen resynthesis well after you are finished working out, sustaining energy levels throughout the day.