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  • SIS SiS Beta Fuel Raspberry & Lemon

SiS Beta Fuel Raspberry & Lemon

$3.99
Excl. tax

The most advanced fueling solution in endurance sports. Our BETA range is built to keep you going for longer, performing stronger, and bouncing back faster.

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The ultra-high levels of carbohydrates provide hours of fuel to endurance athletes without stomach upset. Science in Sport is redefining endurance fueling, having famously powered Chris Froome’s incredible 80km solo ride in Stage 19 of the 2018 Giro d’Italia. Available with electrolytes, as a dual-source drink, or in a unique chewable form!

  • Maintains carbohydrate availability for sustained energy. 
  • Replaces some key electrolytes lost through sweat to support hydration and muscle function.
  • Dual-source carbs deliver higher absorption and faster oxidation than single-source gels.
  • Proven to minimize stomach discomfort during prolonged endurance exercise.
  • One to two gels per hour help deliver both carbohydrates and electrolytes for optimal performance in warm or high-sweat conditions.

OPTIMAL HYDRATION

Each gel contains 200mg of sodium to replace electrolytes lost through sweat and support fluid balance.

SUSTAINED ENERGY

Delivers 40g of fast-absorbing carbohydrates per gel to keep you energized through long efforts.

DUAL SOURCE FORMULA

An optimal 1:0.8 ratio of maltodextrin to fructose for superior carbohydrate absorption and utilization.

Built for Longer Sessions

The only advanced fueling solution engineered for endurance exercise lasting two hours or more.