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SIS Go Isotonic Energy Gel Variety Pack 7 X 60ML
SIS Gel Beta Fuel 60ml Strawberry & Lime
SIS Gel Beta Fuel 60ml Orange
SIS GEL BETA FUEL+ NOOTROPICS 60ML APPLE
SIS GO Lemon Hydration Tablet
SIS GO PLUS Fruit Salad Isotonic Energy Gel 60mL
SIS GO Grapefruit Hydration Tablet
SIS GO PLUS Double Espresso Caffeinated Isotonic Energy Gel 60mL
SIS GO PLUS Apple Isotonic Energy Gel 60mL
SIS GO Hydro Tablets 20 X 4.3g Berry
SIS GO PLUS Lemon & Lime Isotonic Energy Gel 60mL
SIS GO PLUS Tropical Isotonic Energy Gel 60mL
SIS GO PLUS Pineapple Isotonic Energy Gel 60mL
SIS Beta Fuel 80 Energy Drink Sachet Red Berry
SIS GO Strawberry & Lime Hydration Tablet
SIS GO Strawberry Baked Energy Bar 50g
SIS GO Lemon Baked Energy Bar 50g
SIS GO Lemon & Mint Energy Plus Electrolytes Gel 60mL
SIS GO PLUS Blackcurrant Isotonic Energy Gel 60mL
SIS Go Energy Plus Caffeine Energy Gel 60ML Berry
SIS Beta Fuel Dual Source Energy Gel 60ml Neutral
SIS Go Electrolyte Powder 1.6kg Orange
SIS Beta Fuel 80 Energy Drink Sachet Orange
SIS Beta Fuel + Electrolytes Gel 60ml Raspberry & Lemon
SiS GO Energy Mini Bar Blueberry (Single 40g)
SIS GO Electrolyte Sports Fuel 500g Lemon Lime
SIS GO Lemon & Lime Electrolyte Powder 1.6kg
SIS GO Chocolate Fudge Mini Energy Bar 40g
SIS Beta Fuel Energy Chews Lemon
SIS Go Energy Plus Electrolyte Gel Raspberry 60ml Sachet
SIS Beta Fuel Energy Chew Orange
SIS GO PLUS Orange Isotonic Energy Gel 60mL
SIS Beta Fuel 80 Energy Drink Sachet Strawberry & Lime
SIS GO Energy Bake Bar Tiramisu 50g
SIS GO Pineapple & Mango Hydration Tablet
SIS GO Cola Caffeinated Hydration Tablet
Shop SIS
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.
The SIS Story
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.
Shop SIS Categories
Why Ride SIS?
- 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.
Popular SIS Ranges Explained
SIS Gel Beta
SIS Gel Beta offers high-carbohydrate energy gels using scientific carbohydrate blends that help sustain power over long rides. Each gel delivers energy quickly without overloading the stomach, letting riders stay fuelled and focused when fatigue sets in.
SIS Go Isotonic
SIS Go Isotonic gels are lighter-texture gels that replace fluid and minerals as well as energy. They’re great when sipping is difficult or you need to keep hydration balanced alongside fuel intake.
SIS Go Plus
SIS Go Plus brings you energy plus hydration support in one gel. It has the right mix of carbohydrates and electrolytes to help prevent cramp and maintain effort during longer, harder rides.
SIS Go Lemon
SIS Go Lemon hydration tablets let you add flavour and electrolytes to your water easily. Ideal for when you're sweating heavily and need gentle replenishment to avoid performance dips.
SIS Go Hydro
SIS Go Hydro offers hydration tablets that dissolve into drinks, giving you a steady supply of electrolytes alongside low-sugar content so your stomach isn’t overwhelmed.
SIS Go Strawberry
SIS Go Strawberry hydration tablets provide a fruity option to stay on top of your fluid balance, helping you replace minerals lost through sweat with minimal sweetness and irritation.
