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SiS (Science in Sport)

Buy 4 Beta Fuel, Get 3 Free GO Isotonic Energy Gels


IT'S HERE. The fuel behind Team Sky's victory at the 2018 Giro d'Italia. 80g carbohydrate. 100% isotonic. Ideal for endurance exercise lasting over 2.5 hours. Taste the world's most powerful sports drink: SiS BETA FUEL. 

SiS Beta Fuel is designed to deliver the maximum amount of carbohydrate in a 2:1 ratio of Maltodextrin to Fructose whilst limiting gastrointestinal distress. 

  • 20 mmol/L sodium
  • 500 ml of fluid per serving.
  • 2:1 ratio maltodextrin:fructose
  • 80g total carbohydrate
  • Isotonic
  • pH neutral
  • Natural flavours and sweetener
  • Added Sodium, Potassium, Magnesium and Calcium
  • Flavors: Orange, Lemon Lime 



Mix one serving (84 g) of Beta Fuel with 500 ml of fluid and drink little & often during exercise to meet fuelling requirements.


A rate limiting factor of exogenous carbohydrate utilization during exercise is the transportation of the nutrients across the intestinal wall. Once the sodium-dependent transporter, used to transport maltodextrin, is saturated at 60 g.h additional carbohydrate can be absorbed through another transporter, GLUT5, used to transport fructose.

Fuelling requirements for long endurance events (greater than 2.5 hours) are 60-90 g of carbohydrate per hour. The ability to deliver such high levels of carbohydrate with minimized risk of GI issues is crucial to performance. Beta Fuel can be used to meet these fuelling demands in an isotonic solution.


Typical Values Per 100g Per Serving 84g
Energy 1623kj/382kcal 1364kj/321kcal
Fat 0.0g 0.0g
of which saturates 0.0g 0.0g
Carbohydrate 95g 80g
of which sugar 32g 27g
Protein 0.0g 0.0g
Salt 0.68g 0.57g


*Reference intake of an average adult (8400kj/2000kcal)


 SiS GO Isotonic Energy Gel 

Go faster and longer with the world's first Isotonic gel that provides fast energy boost without the need of water, designed to be clean in the mouth and easy on the stomach.

  • Flavoured Maltodextrin gel with added sweetener.
  • Use during endurance sessions and events to help avoid flagging
  • Comes in convenient 60 ml gel packs 
  • Best before end: 6 months+


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