And what happens to a lactate once the cells actually produces? Let's begin by focusing on question number one. Why do cells produce lactate? Well, remember that glycolysis, which is basically used to form ATP molecules and Pyruvate molecules from glucose, is not a perfect process. And what that means is it actually uses up important molecules known as mad plus molecules, nicotine amide, adenine, dinucleotides. And these molecules are needed by glycolysis to actually continue the process of glycolysis.