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SIS · Energy gel
40 g of carbohydrate plus caffeine and nootropics for the late stages of long efforts.
$5.99
PriceIn stock, ready to ship
When a long ride or race demands both fuel and concentration, this gel delivers 40 g of carbohydrate alongside 200 mg of caffeine and a nootropic blend. It is best suited to endurance sessions over two hours, but the high caffeine content and maximum one-gel-per-day recommendation make it a product to plan into your nutrition strategy rather than use casually.
Sold by Ashburton Cycles
Verified store
Price
$5.99
Volume
60 ml
Carbohydrate
40 g
Carbohydrate ratio
1:0.8 maltodextrin to fructose
The SIS BETA FUEL + Nootropics Gel combines 40 g of carbohydrate with a 1:0.8 maltodextrin-to-fructose ratio, giving you a substantial serving of dual-source fuel in a single 60 ml sachet. It is designed for prolonged endurance exercise, particularly the latter stages when maintaining physical output and concentration becomes more demanding. The semi-liquid, free-flowing texture is easy to consume directly from the packaging.
Alongside the carbohydrate, each gel contains 200 mg caffeine, 250 mg Cognizin® Citicoline, 1 g L-Taurine and 200 mg L-Theanine. The combination is intended to support alertness, focus and mental performance as fatigue builds. In practical testing, the caffeine was noticeable as a useful part of the gel, although the extra nootropic ingredients did not produce an obvious difference for every tester.
The Lemon & Lime flavour has a sour citrus profile with lime notes and a bitter aftertaste. Its 60 ml format provides more carbohydrate than many smaller gels, but it is also bulkier to carry, and some users may prefer to take water alongside it. Use it as part of a wider fuelling plan: SIS recommends combining BETA Fuel products to reach 80–120 g of carbohydrate per hour, while limiting this specific nootropic gel to one serving per day. It is vegan and vegetarian, and is manufactured in the United Kingdom.
A strong choice for endurance athletes tackling events or training sessions longer than two hours who want a high-carbohydrate gel with a substantial caffeine hit and planned mental-performance support.
40 g carbohydrate per gel
A substantial single-serving hit helps you carry more fuel in fewer sachets during long rides, runs and races.
1:0.8 dual-source formula
Maltodextrin and fructose provide two carbohydrate sources for a high-intake endurance fuelling strategy.
Caffeine plus nootropic blend
Each gel contains 200 mg caffeine, 250 mg Cognizin® Citicoline, 1 g taurine and 200 mg L-theanine to support alertness and focus.
Built for the late stages
Designed for prolonged efforts over two hours, particularly when fatigue begins to affect concentration and decision-making.
Free-flowing gel texture
The semi-liquid consistency can be consumed directly from the sachet without mixing or preparation.
Lemon & Lime flavour
A sour lemon profile with lime back notes and a bitter finish for customers who prefer a sharper citrus taste.
Vegan and vegetarian
Suitable for vegan and vegetarian fuelling plans, with no listed EU allergens including gluten, milk, soya, nuts or peanuts.
Gel Review Ep. 1: Is SIS Beta Fuel the Best Fuel for Runners?
James Hudson
Every detail as listed by the manufacturer.
SIS is a sports nutrition brand founded in 1992 and focused on fuelling endurance and high-intensity exercise. It is known for developing practical carbohydrate, hydration and recovery products for athletes. SIS introduced what it describes as the world's first isotonic energy gel, designed to provide carbohydrate during exercise without requiring additional water. The GO isotonic gel range subsequently received the Queen's Award for Enterprise.
SIS · Energy gel
40 g of carbohydrate plus caffeine and nootropics for the late stages of long efforts.
$5.99
In stockVolume
60 ml
Carbohydrate
40 g
Carbohydrate ratio
1:0.8 maltodextrin to fructose
Caffeine
200 mg
When a long ride or race demands both fuel and concentration, this gel delivers 40 g of carbohydrate alongside 200 mg of caffeine and a nootropic blend. It is best suited to endurance sessions over two hours, but the high caffeine content and maximum one-gel-per-day recommendation make it a product to plan into your nutrition strategy rather than use casually.
The SIS BETA FUEL + Nootropics Gel combines 40 g of carbohydrate with a 1:0.8 maltodextrin-to-fructose ratio, giving you a substantial serving of dual-source fuel in a single 60 ml sachet. It is designed for prolonged endurance exercise, particularly the latter stages when maintaining physical output and concentration becomes more demanding. The semi-liquid, free-flowing texture is easy to consume directly from the packaging.
Alongside the carbohydrate, each gel contains 200 mg caffeine, 250 mg Cognizin® Citicoline, 1 g L-Taurine and 200 mg L-Theanine. The combination is intended to support alertness, focus and mental performance as fatigue builds. In practical testing, the caffeine was noticeable as a useful part of the gel, although the extra nootropic ingredients did not produce an obvious difference for every tester.
The Lemon & Lime flavour has a sour citrus profile with lime notes and a bitter aftertaste. Its 60 ml format provides more carbohydrate than many smaller gels, but it is also bulkier to carry, and some users may prefer to take water alongside it. Use it as part of a wider fuelling plan: SIS recommends combining BETA Fuel products to reach 80–120 g of carbohydrate per hour, while limiting this specific nootropic gel to one serving per day. It is vegan and vegetarian, and is manufactured in the United Kingdom.
A strong choice for endurance athletes tackling events or training sessions longer than two hours who want a high-carbohydrate gel with a substantial caffeine hit and planned mental-performance support.
40 g carbohydrate per gel
A substantial single-serving hit helps you carry more fuel in fewer sachets during long rides, runs and races.
1:0.8 dual-source formula
Maltodextrin and fructose provide two carbohydrate sources for a high-intake endurance fuelling strategy.
Caffeine plus nootropic blend
Each gel contains 200 mg caffeine, 250 mg Cognizin® Citicoline, 1 g taurine and 200 mg L-theanine to support alertness and focus.
Built for the late stages
Designed for prolonged efforts over two hours, particularly when fatigue begins to affect concentration and decision-making.
Free-flowing gel texture
The semi-liquid consistency can be consumed directly from the sachet without mixing or preparation.
Lemon & Lime flavour
A sour lemon profile with lime back notes and a bitter finish for customers who prefer a sharper citrus taste.
Vegan and vegetarian
Suitable for vegan and vegetarian fuelling plans, with no listed EU allergens including gluten, milk, soya, nuts or peanuts.
Gel Review Ep. 1: Is SIS Beta Fuel the Best Fuel for Runners?
James Hudson