Well, the answer to that lies to the ratio of NADH to NAD plus. High levels of NADH, or high ratio of NADH to NAD plus basically means we have way more reactants, and that will drive the reaction forward. And so high levels of NADH or high ratio of NADH to NAD plus basically means we'll have many D three hydroxybutyrate molecules compared to aceto acetate. So, once again, within the matrix of the mitochondria, the z three hydroxybutyrate dehydrogenase enzyme can reduce the acetoacetate into another ketone body known as z three hydroxybutyrate. And the equilibrium of these two molecules basically is determined by the ratio of NADH to NAD plus within the matrix of the mitochondria. Now, the other reaction that can take place is the spontaneous decarboxylation of the acetone acetate to this nonmetabolizable form, the acetone, which can be released via the breathing process.