Source Naturals Pyruva-Nectar is a refreshing, tropical punch drink mix providing five grams of calcium pyruvate monohydrate per serving. Pyruvate plays an important role in metabolism and the energy production process. It is the link between two of the main energy-generating cycles int the body, glycolysis (anaerobic metabolism) and the Krebs cycle (aerobic metabolism). When used with the Maximum Metabolism Weight Loss Plan , Pyruva-Nectar may help energize the body. Source Naturals Pyruva-Nectar is manufactured by Med-Pro Industries using a unique process that ensures the product's stability and high purity.