Beet Kvass is an excellent blood tonic, promotes health digestion and regular clearing of the bowels, alkalizes the blood and cleanses the liver. It is beneficial for reflux sufferers, aiding in the first digestive process in the upper stomach. Kvaas is a good treatment for kidney stones and other ailments. Widely used to support cancer treatment in Europe, reports indicate that kvass is also an excellent tonic for chronic fatigue.