Science in Sport (SiS) believe that the most sophisticated piece of sports equipment you’ll ever own is your body. If you don’t put high performance sports nutrition in, you won’t get your full potential out.
Their range of products are researched and developed by sports scientists in conjunction with international athletes. This scientific research underpins everything we do to ensure that all our products meet the exacting standards of Informed Sport. This means that everything we do and every personal best you achieve with us, is FUELLED BY SCIENCE.
Fluid is best absorbed when delivered as part of a carbohydrate-electrolyte drink, so SiS GO Electrolyte is the primary option for hydration and energy in events longer than 90 minutes.
The main difference between the two products is the carbohydrate content. SiS REGO Rapid Recovery has 25g of carbohydrate and 20g of protein per serving. It is best to use it for after training sessions which have significantly depleted your glycogen stores, such as long endurance or high intensity sessions.
SiS Whey Protein contains 23g protein per serving, with less than 2g each of carbohydrate or fat per serving. This makes it a convenient source of high quality protein with very little else, ideal for supporting your lean muscle mass.
No, they were designed to make it easy for an athlete to take an energy boost that is convenient during exercise and light on the stomach. More concentrated gels, particularly those which contain simple sugars such as glucose and fructose are more likely to cause gastric distress. No additional water is needed to help the absorption of SiS GO Isotonic gels, but you should still drink to remain hydrated during your activity.
Introducing the GO Energy Bar Mini, a power-packed snack designed to fuel your body during intense exercise and keep you energized throughout your...
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SiS' GO Isotonic Energy Gel is an award-winning and highly acclaimed product designed to provide athletes with a convenient and effective source o...
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The SIS Original Isotonic GO Energy Gel with added electrolytes is a powerful tool for assisting with hydration and maintaining performance during...
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The revolutionary GO Energy Bake is poised to redefine the energy bar landscape with its groundbreaking design and scientific formulation. Unlike ...
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GO Energy + Caffeine Gel is an exceptional energy gel meticulously crafted for high-intensity competitions and endurance events. This innovative g...
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Introducing the Beta Fuel Dual Source Energy Gel, a groundbreaking addition to our world-leading fuelling solution range. Engineered with a revolu...
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Are you an endurance athlete seeking a cutting-edge fueling solution to assist with your performance and push your limits? Look no further than Be...
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SiS REGO Rapid Recovery Powder stands at the forefront of post-exercise recovery supplements, offering a cutting-edge formula meticulously designe...
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Introducing the Beta Fuel + Nootropics Energy Gel: an evidence-based fuel designed to elevate both your physical and mental power output. This cut...
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Introducing the Protein20 Vegan Bar, a high-protein snack designed specifically for athletes seeking a plant-based alternative that doesn't compro...
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Introducing the Science in Sport Beta Fuel Energy Drink, the most scientifically superior fuel on the market. Trusted by top-tier athletes, this r...
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ERGONOMIC DRINKS BOTTLE FOR CYCLISTS AND ENDURANCE ATHLETES As seen on tour, our SiS Drinks Bottle is a water bottle designed for fuelling for lon...
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GO Hydro Electrolyte is not just your ordinary hydration solution; it is a true game-changer when it comes to enhancing performance through optima...
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WORLD-RENOWNED SUPPLEMENT BOTTLE FOR POWDERED SPORTS NUTRITION The Original Buch Steiner MixMaster Shaker®, our feature-packed SiS-branded Protein ...
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SIS' VERSATILE 2.2-LITRE WATER JUG FOR CONVENIENT HYDRATION Made with tough BPA-free plastic, the SiS 2.2L Water Jug is a water bottle with a large...
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OUR DOUBLE-WALLED STAINLESS-STEEL SHAKER FOR POWDERED SUPPLEMENTS Robust and durable, our stylish SiS Double Wall Stainless Steel Shaker is an insu...
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The GO Isotonic Energy Gel Variety Pack offers a convenient and effective way to replenish your carbohydrate stores during exercise, helping to co...
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GO Electrolyte Powder is a specially formulated sports drink designed to provide athletes and fitness enthusiasts with the perfect combination of ...
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Introducing Science in Sport's revolutionary product, 100% Pure Beta Alanine! Designed to assist with your performance during short bouts of high-...
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Indulge in the refreshing taste of REGO Whey Recovery, a premium protein drink crafted to invigorate your body after short, less intense bursts of...
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The REGO Clear Recovery supplement is meticulously crafted to facilitate post-exercise recovery, combining 20g of clear whey protein with 21g of c...
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Ideal for successive bursts of short-term, high intensity exercise. High quality version of one of the most commonly used sports supplements. 5g o...
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GO Energy Powder is a highly effective and easily digestible carbohydrate supplement that provides a quick supply of energy. This versatile produc...
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Introducing the Beta Fuel Pack from Science in Sport, created by XMiles, specifically tailored to meet the needs of athletes across the spectrum. ...
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