The answer is adenosine triphosphate (ATP). Glycolysis is the metabolic pathway of glucose degradation which products are 2 molecules of pyruvate, 2 molecules of NADH, 2 molecules of ATP, hydrogen ions, and water. The free energy that is released in this process is stored in the form of ATP and NADH. However, the energy stored in ATP is greater than the energy stored in NADH. So, at the end of glycolysis, the most of the energy of glucose is stored in ATP.