SiS Beta Fuel is the drink mix elite endurance athletes use to hit the carbohydrate numbers modern racing demands. It suits riders on events over 2 hours who need serious fuel in a form the stomach will tolerate. Each 82g sachet delivers 80g of carbohydrate in a 1:0.8 maltodextrin to fructose ratio. That ratio matters: it lifts the proportion of carbohydrate your body actually oxidises from 62% to 74% compared with the older 2:1 formulation, and riders report less stomach fullness on it. Tip 1 sachet into 600ml of water, shake, then sip steadily rather than in big hits. Key features 80g of carbohydrate per 82g sachet 1:0.8 maltodextrin to fructose ratio for higher oxidation efficiency Isotonic formulation, easier on the stomach at volume Mix-and-go powder, dissolves in 600ml of water Informed Sport certified Use 1 sachet per hour, or combine with Beta Fuel gels and chews to reach 80 to 120g of carbohydrate per hour. Practise the full plan in training first.