Natural lemon flavor. Step 2: Refuel. Hydrate with the electrolytes of a sports drink. Only 10 calories per serving. PowerBar Electrolytes is the great tasting drink mix from PowerBar, a long-time trusted name in sports nutrition. With the electrolytes of the leading sports drink and only 10 calories per serving, PowerBar Electrolytes helps you stay hydrated to get more out of your workout. Contains no fruit juice. Made in USA.