Advanced electrolyte system. Flavored + other natural flavors. 0 calories per 12 fl oz serving. Helps replenish 4 electrolytes lost in sweat: Na: sodium; K: potassium; Ca: calcium; Mg: magnesium. Powerade Zero is the great-tasting electrolyte-enhanced sports drink formulated with vitamins B3, B6 & B12 to help the body metabolize energy from food. www.poweradezero.com. Please recycle.