What is the SiS GO Isotonic Energy Gel (60ml)? It is a ready-to-use isotonic carbohydrate gel that delivers about 22 g of fast-acting carbs and roughly 87 calories per 60 ml sachet. Its isotonic formula is designed to be swallowed without water and to empty quickly from the stomach for fast fuel during endurance exercise.
About Science in Sport (SiS)
Science in Sport is a British endurance-nutrition brand trusted by professional cyclists, runners and triathletes. SiS pioneered the isotonic energy gel — a gel that matches the body's fluid concentration so it can be taken without chasing it with water.
Why we carry it
Most energy gels are thick and sticky and demand a swig of water or they sit heavy in your gut. The SiS isotonic format is the one our endurance customers keep coming back for — it goes down easily mid-run or mid-ride and is far gentler on the stomach. A genuine performance staple, not a gimmick.
Key features
- ~22 g of fast-digesting carbohydrate (maltodextrin-based) per 60 ml gel
- ~87 calories per sachet
- Isotonic formula — designed to be taken without water
- Caffeine-free (the standard GO Isotonic gel) for fuelling at any point in a session
- Gluten-free and suitable for vegans; multiple fruit flavours
Who it's for
Runners, cyclists, triathletes and other endurance athletes who need quick, easy-to-digest carbohydrate during training or racing — especially anyone who finds traditional thick gels hard on the stomach.
About this product
During prolonged exercise your muscles burn through stored carbohydrate, and topping up with fast-absorbing carbs helps maintain pace and delay fatigue. The maltodextrin in SiS GO gels provides that carbohydrate, and the isotonic consistency means the gel doesn't need extra fluid drawn into the stomach to dilute it — so it empties quickly and is less likely to cause bloating. A common guideline is roughly one gel every 20–30 minutes during sustained effort, but follow your own fuelling plan.
Nutrition & ingredients
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Per 60 ml sachet: ~87 kcal, ~22 g carbohydrate, 0 g fat, 0 g protein
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Carbohydrate source: maltodextrin (from maize)
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Other ingredients: water, gelling agents (gellan gum, xanthan gum), acidity regulators (citric acid, sodium citrate), natural flavouring, preservatives (sodium benzoate, potassium sorbate), sweetener (acesulfame K), sodium chloride, antioxidant (ascorbic acid)
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Free from: gluten; suitable for vegans
Comparison
| Gel |
Carbs |
Format |
Notes |
| SiS GO Isotonic Gel (60 ml) |
~22 g |
Isotonic, no water needed |
Caffeine-free, gentle on stomach |
| Prozis Energy Gel (25 g) |
Concentrated carb gel |
Smaller, more concentrated sachet |
Compact fuel |
Pairs well with
Great alternative to
If a thick, water-dependent energy gel upsets your stomach mid-effort, the SiS isotonic gel targets the same goal — fast carbohydrate during endurance exercise — in a format you can take on its own without bloating.
Why buy from Top Nutrition & Fitness
Top Nutrition & Fitness is a premium Montreal sports-nutrition retailer serving Canada since July 2016. We taste-test and curate our endurance fuel and ship quickly across Canada.
FAQ
Do I need to drink water with this gel?
No — that is the whole point of the isotonic format. It matches the body's fluid concentration so it can be taken on its own, though staying generally hydrated during exercise is still important.
How many carbs are in one gel?
About 22 g of fast-acting carbohydrate per 60 ml sachet, at roughly 87 calories.
Does it contain caffeine?
The standard GO Isotonic gel is caffeine-free. SiS also makes separate caffeinated gels, so check the specific flavour label if you want or want to avoid caffeine.
How often should I take one during a workout?
A common guideline is roughly one gel every 20–30 minutes of sustained endurance effort, but follow your own tested fuelling plan and tolerance.
Is it gluten-free and vegan?
Yes, the GO Isotonic gel is gluten-free and suitable for vegans per the manufacturer.
Shop with confidence: protect any order with optional Onward Checkout+ at checkout — package protection plus extended 90-day returns for total peace of mind.
Version française
À propos de Science in Sport (SiS)
Science in Sport est une marque britannique de nutrition d'endurance utilisée par des cyclistes, coureurs et triathlètes professionnels. SiS a été pionnière du gel énergétique isotonique — un gel qui se prend sans eau.
Pourquoi nous l'offrons
La plupart des gels sont épais et collants et exigent une gorgée d'eau. Le format isotonique de SiS est celui que nos clients d'endurance redemandent — il passe facilement en pleine course et est bien plus doux pour l'estomac.
Caractéristiques clés
- ~22 g de glucides à digestion rapide (à base de maltodextrine) par gel de 60 ml
- ~87 calories par sachet
- Formule isotonique — conçue pour être prise sans eau
- Sans caféine (gel GO Isotonic standard)
- Sans gluten et convient aux véganes; plusieurs saveurs de fruits
À qui s'adresse-t-il
Aux coureurs, cyclistes, triathlètes et autres athlètes d'endurance qui ont besoin de glucides rapides et faciles à digérer pendant l'entraînement ou la compétition.
À propos de ce produit
Lors d'un effort prolongé, les muscles épuisent leurs réserves de glucides; un apport en glucides rapides aide à maintenir le rythme et à retarder la fatigue. La maltodextrine fournit ces glucides, et la consistance isotonique évite d'avoir à diluer le gel dans l'estomac.
Valeur nutritive et ingrédients
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Par sachet de 60 ml : ~87 kcal, ~22 g de glucides, 0 g de lipides, 0 g de protéines
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Source de glucides : maltodextrine (de maïs)
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Autres ingrédients : eau, gélifiants (gomme gellane, gomme xanthane), régulateurs d'acidité, arôme naturel, agents de conservation, édulcorant (acésulfame K), chlorure de sodium, antioxydant (acide ascorbique)
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Sans : gluten; convient aux véganes
Comparaison
Voir le tableau ci-dessus (version anglaise) comparant le gel SiS GO Isotonic au gel énergétique Prozis.
Se marie bien avec
Excellente alternative à
Si un gel épais qui exige de l'eau dérange votre estomac en plein effort, le gel isotonique SiS vise le même objectif — des glucides rapides en endurance — dans un format à prendre seul, sans ballonnement.
Pourquoi acheter chez Top Nutrition & Fitness
Top Nutrition & Fitness est un détaillant montréalais de nutrition sportive haut de gamme au service du Canada depuis juillet 2016, avec expédition rapide partout au pays.
Nutrition information is sourced from the manufacturer and may vary by lot. This is a food product, not a substitute for a varied, balanced diet and healthy lifestyle.
