SiS Beta Fuel + Electrolytes Gel

Carbohydrates for sustained performance

SiS BETA Fuel Energy + Electrolyte Gel belongs to Science in Sport’s advanced BETA Fuel range designed for endurance performance. Each gel contains 40g of carbohydrates in an optimised 1:0.8 maltodextrin–fructose ratio.

The combination of two carbohydrate sources is designed to enhance carbohydrate utilisation, support power output, and reduce gastrointestinal distress caused by large carbohydrate intakes during prolonged exercise.

For workouts and competitions lasting over two hours, athletes can aim for approximately 90–120 grams of carbohydrates per hour. One gel provides a convenient single serving containing 40g of rapidly available carbohydrates.

In a study, the use of BETA Fuel products at a rate of 120 grams per hour during a three-hour cycling session resulted in a high exogenous carbohydrate oxidation rate of approximately 1.6 g/min. The study results support the benefits of the 1:0.8 ratio compared to the traditional 2:1 carbohydrate blend.

Three gels per hour provide a total of 120g of carbohydrates and help maintain carbohydrate availability during prolonged performance. The carbohydrates in BETA Fuel gels can be utilised in the same way as the carbohydrates in the series’ drink powders and energy chews, allowing different product forms to be combined to build a personalised fuelling plan.

Electrolytes support hydration

In addition to carbohydrates, BETA Fuel Energy + Electrolyte Gel contains electrolytes, which help replace minerals lost through sweat during exercise.

Specifically, sodium intake during exercise can help maintain the body's sodium balance, increase thirst, and promote fluid intake and retention in the body. This makes the gel particularly useful in warm conditions, during competitions, and in situations where sweating is more profuse than usual.

Supporting electrolytes and adequate hydration can help maintain body thermoregulation and physical and perceived performance during prolonged exercise.

BETA Fuel Energy + Electrolyte Gel is an effective fuelling option, especially in hot conditions, when the goal is to consume up to 120g of carbohydrates per hour while replenishing sodium lost through sweat.

Research sources

Hearris et al. (2022). 13C-glucose-fructose labeling reveals comparable exogenous carbohydrate oxidation during exercise when consuming 120 g/h in fluid, gel, jelly chew, or coingestion. Journal of Applied Physiology, 132(6), 1394–1406.
O’Brien et al. (2013). Fructose-maltodextrin ratio governs exogenous and other carbohydrate oxidation and performance. Medicine & Science in Sports & Exercise, 45(9), 1814–1824.
Shirreffs et al. (2011). Fluid and electrolyte needs for training, competition, and recovery. Journal of Sports Sciences, 29, 39–46.
Choi et al. (2021). Effects of electrolyte supplements on body water homeostasis and exercise performance during exhaustive exercise. Applied Sciences, 11(19), 9093.
McCubbin et al. (2024). Effect of personalised sodium replacement on fluid and sodium balance and thermophysiological strain during and after ultra-endurance running in the heat. International Journal of Sports Physiology and Performance, 19(2), 105–115.
Patterson & Gray (2007). Carbohydrate-gel supplementation and endurance performance during intermittent high-intensity shuttle running. International Journal of Sport Nutrition and Exercise Metabolism, 17(5), 445–455.
Ali & Williams (2009). Carbohydrate ingestion and soccer skill performance during prolonged intermittent exercise. Journal of Sports Sciences, 27(14), 1499–1508.
Willems et al. (2011). Effects of pre-exercise ingestion of a carbohydrate-electrolyte gel on cycling performance. Journal of the International Society of Sports Nutrition, 8(1), 28.
Carbohydrate solutions contribute to the maintenance of physical performance during prolonged high-intensity exercise in trained adults. The beneficial effect is achieved during exercise lasting at least 60 minutes and performed at an intensity of at least 65% VO₂max.
Jentjens et al. (2004). Oxidation of combined ingestion of glucose and fructose during exercise. Journal of Applied Physiology, 96, 1277–1284.

Nutritional information
Nutritional information /100 ml /serving (60 ml)
Energy 1135 kJ / 267 kcal 681 kJ / 160 kcal
Fat 0 g 0 g
– of which saturates 0 g 0 g
Carbohydrate 67 g 40 g
– of which sugars 31 g 19 g
Protein 0 g 0 g
Salt 0.89 g 0.53 g
Sodium 300 mg 200 mg
Chloride 500 mg (63 %*) 300 mg (38 %*)

Water, maltodextrin (32%), fructose (25%), sodium chloride, natural flavouring, acidity regulators (citric acid, sodium citrate), gelling agents (gellan gum, xanthan gum), flavouring, preservatives (sodium benzoate, potassium sorbate).