Thanks to a resurgence of interest in traditional, cultured foods, beet kvass is making a comeback. Celebrated for centuries as a blood and liver tonic, a new generation is discovering beet kvass through cultured food companies such as Zukay Live Foods and the boutique Jewish food purveyor, Gefilteria, as well as through the current popularity of traditional diets such as the Paleo diet and the Nourishing Traditions eating guidelines promoted by the Weston A. Price Foundation. A probiotic-rich, cultured beverage similar to kombucha or kefir, beet kvass is a traditional Eastern European drink made from beets, water, salt and a starter culture (optional). Refreshing and tasty, beet kvass is loaded with enzymes and antioxidants and, thanks to its high electrolyte content, it is a deeply hydrating beverage.