Some athletes combine SiS gels with hydration products during endurance events to cover both carbohydrate intake and fluid-electrolyte needs. Using both can make it easier to maintain energy and hydration over longer efforts. This approach is common in marathons, cycling races, triathlons, and long training sessions.

SiS GO Isotonic Energy Gels are formulated so they can be consumed without needing additional water, which can make them easier to use during training or racing.

SiS Beta Fuel gels are designed for higher-carbohydrate intake than standard SiS gels. Athletes often use them when they are aiming to maximize fuel intake during longer or more intense efforts. Standard gels are often used for everyday fueling, while Beta Fuel is more associated with higher-performance race strategies.

The SiS Beta Fuel range is designed for athletes who want higher-carbohydrate fueling for long or demanding endurance efforts. It is commonly used in races and hard training sessions where standard fueling may not be enough. Many runners and cyclists use Beta Fuel as part of a more aggressive carbohydrate strategy.

Science in Sport produces a wide range of sports nutrition products including energy gels, high-carb performance fuel, hydration products, powders, and recovery products. The brand serves endurance athletes across training and racing. It is especially known for its gel range and products designed to support performance during exercise.

Some SiS gels contain added caffeine while others are caffeine-free, allowing athletes to choose based on their fueling strategy.

Science in Sport offers hydration products designed to help athletes replace fluids and electrolytes during training and racing. The brand’s hydration range is commonly used alongside gels and other fuel products as part of an endurance nutrition strategy.

Many SiS products are suitable for vegan diets, though athletes should always check individual product packaging.

Many SiS products are formulated without gluten-containing ingredients, but individuals with dietary restrictions should confirm this on product labels.

Science in Sport (SiS) is popular among endurance athletes because it offers easy-to-use fueling products designed for performance during training and racing. The brand is especially known for its isotonic energy gels, which are formulated to be consumed without water, making them convenient during high-intensity efforts. SiS also produces high-carbohydrate fueling products like the Beta Fuel range, widely used by runners, cyclists, and triathletes.