SIS Isotonic Energy Gels 22g Carbs - Fast Fuel for Endurance

Our review of the SIS Isotonic Energy Gels finds them best suited to endurance athletes who need quick, reliable fuel without the faff of water or heavy sweetness. The single biggest reason to buy is the isotonic 22g carbohydrate formula that delivers fast-acting energy with a light consistency, so cyclists, runners and triathletes can take gels on the move and maintain effort without stomach upset or a sugar crash.

Key Features

• 22g fast carbs: Each gel supplies 22g of fast acting carbohydrates to help sustain power and delay fatigue during long workouts and races.
• Isotonic formulation: The gel is formulated so you do not need extra water for digestion, letting athletes fuel without stopping or risking GI distress.
• Low sugar: With 1g or less of sugar per gel, the product aims to provide sustained energy without the rapid spike and subsequent crash associated with high-sugar gels.
• Light texture: The thin, non-sticky consistency makes the gels easy to swallow on the move and reduces interruption to training or racing.
• Informed Sport approved: The brand uses world-class banned substance testing, which is important for competitive athletes seeking certified sports nutrition.

Who It's For

The SIS Isotonic Energy Gels are aimed at endurance athletes - road and gravel cyclists, distance runners, and triathletes - who require quick carb intake and prefer not to carry or drink extra water while racing or training. They suit athletes following a plan to hit 60-90g of carbohydrate per hour and who value a light mouthfeel and low sweetness.

Those who should look elsewhere include athletes who prefer very sweet, dense gels or products with higher protein or electrolytes built in; also anyone needing larger single-serve carbohydrate doses than 22g should plan to take multiple gels or combine with other fuel sources.

Pros & Cons

Pros

• Fast-acting 22g carbohydrate dose that helps maintain energy during extended efforts.
• Isotonic formula removes the need to drink extra water, reducing stomach issues on the move.
• Light, thin texture that is easy to swallow while running or cycling.
• Informed Sport approval offers assurance about banned substance testing for competitive athletes.

Cons

• At 22g per gel, you may need multiple servings to meet higher hourly carbohydrate targets, which adds packaging to manage.

Specifications

Product	SIS Isotonic Energy Gels
Carbohydrate per gel	22g fast acting carbohydrates
Pack size	30 pack
Formulation	Isotonic (no extra water needed)
Sugar content	1g or less per gel
Recommended use	Running, cycling, triathlon, endurance sports
Quality testing	Informed Sport approved

Our Verdict

The SIS Isotonic Energy Gels are a practical, well-tested choice for endurance athletes who want fast fuel without the bulk or sweetness of traditional gels. They deliver consistent energy with minimal stomach upset and good taste, making them good value for anyone who needs easy-to-take, on-the-go carbohydrate during long efforts.

Frequently Asked Questions

Do I need to drink water with these gels?
No, the isotonic formulation is designed so you do not need extra water for digestion, letting you fuel while moving.

How many gels per hour should I take?
Use the gels to help reach recommended targets of about 60-90g of carbohydrate per hour; at 22g each that typically means multiple gels per hour depending on your plan.

Will these upset my stomach?
Most users report good stomach comfort thanks to the light, thin texture and low sugar content, but individual tolerance varies so try them in training first.