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SIS Beta Fuel 80 from Science in Sport is a high-carbohydrate drink mix designed to support demanding endurance efforts such as long bike rides, races, and intensive training sessions. Formulated to deliver a large amount of energy in a drink that is easy to digest, it helps you maintain a steady supply of carbohydrates when your body needs it most. The mix is typically combined with water to create a smooth, palatable drink that can be sipped regularly throughout your ride, helping to delay fatigue and support consistent power output.
This type of fuel is especially popular with cyclists who want to simplify their on-bike nutrition by taking in most of their energy through fluids rather than relying solely on bars or gels. SIS Beta Fuel 80 is generally designed to be gentle on the stomach, using a blend of carbohydrates that can be absorbed efficiently during exercise. Ideal for road, gravel, or MTB riders tackling long distances or high-intensity intervals, it fits easily into your existing hydration setup and pairs well with standard bottles and cages you already use on your bike.
