Joint Juice, Inc., San Francisco, CA, has launched Joint Juice Fitness, a ready-to-drink water-based dietary supplement product. Joint Juice Fitness is a lightly flavored dietary supplement enhanced with 1500 mg glucosamine per bottle to hydrate joints, along with essential vitamins and water to hydrate bodies. Each 16.9-oz. bottle has 10 calories, and comes in Berry, Lemon and Kiwi-Strawberry flavors.