Ketones, B-hydroxybutyrate (BHB), acetoacetate (ACA) and acetone, are the by products of fat breakdown. Ketones are a very powerful and beneficial energy source the body can use like glucose. Ketones have multiple uses in the body. They can be used by the tissues, including the brain, in the body in much the same way as glucose, and are thought to be a superior fuel source to glucose. In fact, ketones actually contain more than twice the energy as glucose and burn much cleaner in your body cells.