Ph D Fitness Overview Muscle Fuel STS bars are a convenient way to replenish your energy quickly. Made with carbohydrates, protein & fibre to aid digestion. These bars are very tasty & formulated for active people who are on the go in need of nourishment. Highlights- Great for replenishing energy- Convenient for use anytime- Made with fibre- Great taste- Ideal for those on the go- Designed with active people in mind