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SiS GO Energy + Electrolyte Gel
200432
Regular price $2.99 {{#has_saved}}GO Energy + Electrolyte Gels deliver 22g of quick-absorbing carbohydrates plus added electrolytes for hydration support. The formula helps sustain energy, delay fatigue, and maintain performance during long or hot training sessions.
Electrolytes like sodium, potassium, and magnesium help replace what you lose through sweat and keep your body balanced mile after mile.
GO Energy + Electrolyte Gels combine fast-acting carbohydrates with key electrolytes to help maintain hydration and energy during tough workouts or long training sessions. Each gel supports fluid balance and keeps your muscles firing when intensity peaks.
Formulated to minimize stomach discomfort: gentle, light, and easy to take
Provides a convenient, fast-acting source of clean energy for sustained performance.
Infused with sodium, potassium, and magnesium to help replace electrolytes lost through sweat
Lightweight and portable: ideal for running, cycling, or any endurance training
SiS BETA Fuel Gel
132334
Regular price $3.99 {{#has_saved}}The most advanced fueling solution in endurance sports. SiS BETA range is built to keep you going for longer, performing stronger, and bouncing back faster. 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.
BETA Fuel Energy Gel delivers the most advanced fueling solution in endurance sports. Each gel provides 40g of dual-source carbohydrates in an optimized 1:0.8 ratio of maltodextrin to fructose, engineered to help athletes go farther, stay stronger, and recover faster.
Contains 40g of fast-acting, dual-source carbohydrates per gel
An advanced 1:0.8 ratio of maltodextrin to fructose for efficient energy delivery
Formulated for endurance efforts lasting 2 hours or more, when your body needs sustained energy
Supports 90–120g of carbohydrate intake per hour for optimal endurance and faster recovery
BETA Fuel Energy Gel provides a powerful combination of 40g of carbohydrates in a 1:0.8 maltodextrin-to-fructose ratio, allowing your body to absorb and use more energy efficiently.
Designed for long-distance athletes training or racing beyond 2 hours, this dual-source system helps sustain pace and delay fatigue when it matters most.
SiS BETA Fuel + Electrolyte Gels
132370
Regular price $4.49 {{#has_saved}}A dual-source energy gel with added electrolytes for endurance performance
Built for endurance athletes tackling 2+ hours of moderate to high-intensity exercise, this gel delivers fast-acting carbohydrates and key electrolytes right when your body needs them most.
Each gel contains 200mg of sodium to replace electrolytes lost through sweat and support fluid balance.
Delivers 40g of fast-absorbing carbohydrates per gel to keep you energized through long efforts.
An optimal 1:0.8 ratio of maltodextrin to fructose for superior carbohydrate absorption and utilization.
The only advanced fueling solution engineered for endurance exercise lasting two hours or more.
When training or competing in hot temperatures, your body loses vital electrolytes that can limit performance. BETA Fuel + Electrolyte Gels combine dual-source carbohydrates with added sodium to help replace what you lose through sweat. Keeping you hydrated, fueled, and focused.
Designed for endurance athletes pushing through sessions lasting 2+ hours, this gel helps you reach fueling targets of 90- 120 g of carbohydrates per hour, while maintaining electrolyte balance and energy stability.
SiS GO Energy + Caffeine Gels
100123
Regular price $2.99 {{#has_saved}}GO Energy + Caffeine delivers both physical and mental drive to help you start and finish strong. Each gel provides 22g of fast-absorbing carbohydrates to maintain energy and 75mg of caffeine to increase alertness and reduce fatigue.
No extra water needed: just tear, squeeze, and go. Perfect for use during the final stages of exercise or competition, when your focus and endurance are put to the test.
A fast-acting blend of 22g of liquid carbohydrates and 75mg of caffeine to power both body and mind during training or competition
Smooth, light texture for quick absorption and minimal stomach discomfort.
Caffeine sharpens focus and alertness, helping you push through fatigue.
Delay exhaustion with a science-backed blend that helps you go the distance.
A convenient, portable gel that fits seamlessly into any fueling plan.
SiS GO Isotonic Energy Gels
100121
Regular price $2.49 {{#has_saved}}Containing 22g of carbohydrates and designed for versatile fueling, whether for endurance or intensity, this clean energy source helps you keep your pace, push through fatigue, and finish strong
Easy on your stomach, the gel is designed for rapid digestion
The unique formula allows for easy consumption without needing extra water
Lightweight, portable, and perfect for training, competition, or any workout that demands endurance
Formulated with maltodextrin, a clean, single-source carbohydrate that delivers reliable energy
SiS HYDRO Tablets
132511
Regular price $14.99 {{#has_saved}}Stay hydrated every day with HYDRO Tablets, an easy, drop-in-water tablet that combines essential electrolytes and B vitamins to support energy, muscle function, and fluid balance, whether you’re training, recovering, or simply staying active.
Each tablet contains sodium, calcium, magnesium, and potassium.
Dissolves quickly in water for easy, convenient hydration wherever your day takes you.
Replaces electrolytes lost through sweat to maintain your body’s fluid balance during exercise.
Includes B1, B2, and B6(1,2) to support energy metabolism and protein utilization, helping your body convert food into fuel and recover efficiently.
SiS BETA Fuel + Nootropics
132335
Regular price $4.49 {{#has_saved}}BETA Fuel + Nootropics represents the most advanced endurance nutrition ever developed, combining a dual-source, high-carbohydrate formulation with cognitive enhancers to deliver both physical energy and mental clarity during long, demanding efforts. It’s engineered for athletes who train and compete beyond limits.
Delivers 40g of dual-source carbohydrates per gel
Enhanced with nootropics to sharpen focus and counter fatigue
Built to fuel endurance sessions that last 2 hours or more
Advanced 1:0.8 ratio of maltodextrin to fructose for efficient absorption
The innovative BETA Fuel Energy Gel + Nootropics blends 40g of dual-source carbohydrates with 250mg Cognizin® Citicoline, 1g L-Taurine, 200mg caffeine, and 200mg L-Theanine to elevate both physical and mental performance.
Often called “smart compounds,” Nootropics support how the brain functions under stress, fatigue, or extended effort. This balanced formulation heightens alertness and focus while minimizing caffeine-related jitters, helping you stay clear-headed, confident, and in control when the pressure rises.
SiS HYDRO+ Drink Mix
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Regular price $2.49 {{#has_saved}}HYDRO+ is a fast-dissolving electrolyte drink mix that supports optimal hydration for training, competition, or everyday activity. Designed for athletes who know that performance starts with staying hydrated.
Each 4.1g serving includes Calcium, Magnesium, Chloride, Sodium, and Potassium to help your body stay balanced and hydrated.
Supports energy production and a healthy immune system, so you can train harder and recover faster.
Help reduce tiredness and fatigue, supporting sustained performance throughout your day or workout.
Single-serve sachets (4.5g) make it easy to stay hydrated anywhere. Perfect for busy days, workouts, and travel.
SiS Sports bottle
010080
Regular price $6.99 {{#has_saved}}Science in Sport branded opaque water bottle, featuring easy-mix design and narrow spout for flow control.
Designed for sustained performance, the SiS 27oz Water Bottle delivers high-volume hydration for relentless sessions, with an ergonomic grip and a zero-fail leakproof seal.
High capacity for harder sessions, without the constant refills.
No spills. Focus on your performance, not your bottle.
Safe, clean, and performance-ready hydration.
