Skip to content
Science in Sport

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.

Isotonic Energy Gel
Beta Fuel Energy Drink
FREQUENTLY ASKED QUESTIONS Why use Science in Sport?

WHEN SHOULD I USE SIS GO ELECTROLYTE RATHER THAN SIS GO HYDRO?

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.

WHEN SHOULD I USE SIS REGO RAPID RECOVERY VERSUS SIS WHEY PROTEIN?

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.

ARE SIS GO ISOTONIC ENERGY GELS DESIGNED TO REPLACE ISOTONIC DRINKS?

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.

  • SiS Chews Banana Fudge GO Energy Bar Mini XMiles
    SiS Energy Bars GO Energy Bar Mini XMiles
    SiS

    GO Energy Bar Mini

    From €1,82 - €39,13 EUR

    Introducing the GO Energy Bar Mini, a power-packed snack designed to fuel your body during intense exercise and keep you energized throughout your...

    View full details
  • SiS Gels GO Isotonic Energy Gel 60ml XMiles
    SiS Gels GO Isotonic Energy Gel 60ml XMiles
    SiS

    GO Isotonic Energy Gel

    From €2,28 - €45,00 EUR

    SiS' GO Isotonic Energy Gel is an award-winning and highly acclaimed product designed to provide athletes with a convenient and effective source o...

    View full details
  • SiS Bars / Food Strawberry GO Energy Bakes XMiles
    SiS Bars / Food GO Energy Bakes XMiles
    SiS

    GO Energy Bake

    From €2,61 - €24,65 EUR

    The revolutionary GO Energy Bake is poised to redefine the energy bar landscape with its groundbreaking design and scientific formulation. Unlike ...

    View full details
  • SiS Gels GO Energy + Caffeine 60ml Gel (75 / 150mgl) XMiles
    SiS

    GO Energy + Caffeine Gel

    From €2,80 - €75,65 EUR

    GO Energy + Caffeine Gel is an exceptional energy gel meticulously crafted for high-intensity competitions and endurance events. This innovative g...

    View full details
  • SiS Gels Orange Beta Fuel Gel XMiles
    SiS Gels Beta Fuel Gel XMiles
    SiS

    Beta Fuel Gel

    From €2,87 - €81,78 EUR

    Introducing the Beta Fuel Dual Source Energy Gel, a groundbreaking addition to our world-leading fuelling solution range. Engineered with a revolu...

    View full details
  • SiS Protein Bar Peanut Butter & Jelly SiS Protein20 Vegan Bar (64g) XMiles
    SiS Protein Bar SiS Protein20 Vegan Bar (64g) XMiles
    SiS

    Protein20 Vegan Bar

    From €3,72 - €40,03 EUR

    Introducing the Protein20 Vegan Bar, a high-protein snack designed specifically for athletes seeking a plant-based alternative that doesn't compro...

    View full details
  • SiS Energy Drink Beta Fuel Energy Drink (82g) XMiles
    SiS

    Beta Fuel Energy Drink

    From €4,05 - €50,05 EUR

    Introducing the Science in Sport Beta Fuel Energy Drink, the most scientifically superior fuel on the market. Trusted by top-tier athletes, this r...

    View full details