So this is exactly why we call it alcohol fermentation because we form ethanol. In fact, this is the method by which we actually synthesize alcohol that is then sold in bars and so forth. So we see that alcohol fermentation involves the process of glycolysis as well as this process here. So in yeast cells, for example, they produce ATP and to continually produce the ATP the Pyruvate basically undergoes these two steps to produce ethanol as well as regenerate the NAD plus that can then go into our glycolysis cycle to produce even more ATP molecules. So this is how we actually regenerate and we reuse our NAD plus molecules. Now, let's move on to a more common cycle that takes place in human cells known as the lactic acid fermentation.