SiS Beta Fuel Energy Chew

World-Leading Fuel in a Convenient Chew Bar

The SiS Beta Fuel Energy Chew is part of Science in Sport’s groundbreaking Beta Fuel range, delivering 46g of dual-source carbohydrates in a tasty, easy-to-eat chew. Developed with elite athletes, this chew is designed to help endurance athletes fuel smarter, ride stronger, and maintain peak performance for longer.

Why Choose Beta Fuel Energy Chews?

For endurance efforts over two hours, athletes need to consume 80–120g of carbohydrate per hour. The Beta Fuel Chew makes hitting those numbers easier, offering fast-absorbing carbohydrates in a convenient format that’s gentle on the stomach.

Thanks to SiS’s advanced 1:0.8 glucose-to-fructose ratio, these chews optimise carb absorption, reduce GI discomfort, and help you sustain higher power outputs.

The Science – A Smarter Fueling Formula

New 1:0.8 Ratio replaces the old 2:1 ratio
Increases carbohydrate oxidation efficiency from 62% → 74%
Reduces symptoms of stomach fullness & nausea compared to 2:1
Enhances mean power output by 3% during repeated maximal efforts
Allows athletes to use +17% more carbohydrate effectively

Backed by research (O’Brien et al, 2013), the Beta Fuel Chew is proven to help athletes perform harder, for longer, with less discomfort.

Key Features

46g dual-source carbohydrates per pack
Optimised 1:0.8 glucose-to-fructose ratio
Gentle on the stomach – reduced GI stress
Developed with elite athletes
Convenient chew format for on-the-go fueling
Part of the Beta Fuel range alongside gels & drinks

Chews/Bloks

SiS Beta Fuel Energy Chew

Bonk Breaker Energy Chews

SIS BetaFuel Energy Chew 20 Box