SIS is built on science and stomach comfort, giving riders fuel that performs without pain. Our scientifically backed formulas are designed to keep your energy climbing and cramps at bay through long, grueling rides.

Choose SIS for fuel that supports endurance with ingredients proven to be gentle on your gut, helping you stay in the saddle happily, kilometre after kilometre.

Science in Sport (commonly called SIS) began in 1992 in the United Kingdom with a mission to deliver sports nutrition rooted in rigorous research and elite athlete testing. It quickly developed an international reputation through partnerships with professional cycling teams, Olympic squads and sporting bodies, refining its formulas to meet the highest standards of performance, safety and digestion.

SIS remains deeply connected to cycling—its nutrition development driven by cyclists’ needs. The insights gained from elite riders help SIS create formulas that reduce gastrointestinal discomfort and deliver carbohydrate blends athletes trust, so every rider—from club cyclists to weekend adventurers—benefits from endurance fuels they can rely on today.

• SIS Nutrition

• Scientific carbohydrate blends. SIS uses dual-source carbohydrates like maltodextrin and fructose in optimal ratios to increase absorption and keep energy steady while reducing gut distress.
• Certified clean and trusted. Every SIS product is batch tested under the Informed-Sport programme so you know there are no banned substances or hidden nasties.
• Stomach-friendly formulation. SIS designs isotonic formulas, ginger or neutral flavouring, gentle textures, and caffeine-free options so you can fuel comfortably even under strain.
• Endurance experience baked in. Years of testing with pro cyclists and national teams shapes products engineered for long hours—so everyday riders get performance benefits without premium costs.