Limited-time clearance: Tropical, Orange, and Lemon Lime SiS GO Isotonic Gels sale only $1.50 each while supplies last. Short-dated stock expiring July/August 2026.
Science in Sport Go Isotonic Gels are formulated to provide 22 g of carbohydrate as fast-acting energy. The isotonic formula allows you to take these gels without water and are created to be easily digestible and well-tolerated.
SiS Isotonic Gels are officially the world's first isotonic energy gel and are the winner of the Queenโs Award for Enterprise in 2015. SiS continues to be a go-to energy source for elite athletes worldwide.
Same trusted fuel, unbeatable price.
Save 46% on SiS Isotonic Energy Gels in Tropical, Lemon-Lime, and Orange. These gels expire in July or August 2026, making them a great value for athletes looking to stock up on endurance fuel for upcoming training and races.
