GO Isotonic Energy Gel
serving: 1 gel (60ml) · isotonic, ready-to-use; values via thefeed/retailer (sisus JS-rendered)
Texture: Liquid gel · read from the label
How this product rates on the fueling evidence.
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Science in Sport GO Isotonic Energy Gel is a gel with 22 g of carbohydrate, 4 mg of sodium and no caffeine per serving. It scores 73/100 on the CarbRate Science Score. At 60 g of carbs per hour that is 2.5 servings an hour.
Who GO Isotonic Energy Gel suits
Runners fueling below about 60 g per hour. Without a fructose source, absorption tops out near 60 g/hr, so stacking servings past that point tends to cause gut trouble rather than more energy.
Runners who prefer small, frequent doses. 22 g per serving means more servings per hour, which some stomachs handle better than one large hit.
Runners who want to keep caffeine separate, or race caffeine-free. Caffeine-free fuel is easier to repeat every 20 to 30 minutes without stacking a stimulant.
Runners who handle sodium separately. At 4 mg per serving this is a carbohydrate source first, so heavy sweaters will want electrolytes from a drink or capsule alongside it.
Runners with dietary limits: it is vegan and gluten-free according to the manufacturer.
How to use it in a race
Start early. Take the first serving 15 to 20 minutes into the race, before you feel you need it, and repeat on a fixed clock. At 60 g/hr that is 2.5 servings per hour; at 90 g/hr it is 4.
Liquid gel texture, so it goes down without much water. Still sip at aid stations; carbohydrate absorbs faster when the stomach has fluid to work with.
Practice it on long runs at race intensity before you race on it. Gut tolerance is trained; a fuel that felt fine at easy pace can behave differently at marathon effort.
Cost at 60 g/hr works out to about $5.70 per hour at list price, or roughly $20 for a three-and-a-half hour marathon.
Servings per hour assume the 22 g per serving on the label. The finder sets your own g/hr target from race distance, sweat and gut.
Why it scores what it does
Computed from verified label data with the same evidence rules for every product. Retailer relationships play no part in the score.
Single-source glucose/maltodextrin — reliable, but absorption is capped near 60 g/h without added fructose.
22 g carbs per serving — a full working dose for a gel.
No protein — ideal for during-race carbohydrate delivery (nothing slowing gastric emptying).
If this one works, try these next
Closest fueling profiles in the database (same format, carb sources, glucose:fructose and caffeine), with the one thing each does differently. Test two, not twenty.
How it went for runners like you
No reports yet. If you have raced or trained on this one, thirty seconds from you is the first data point for the next runner with your gut and your conditions.
GO Isotonic Energy Gel FAQ
Is Science in Sport GO Isotonic Energy Gel good for a marathon?
It works for a marathon at moderate intake. It uses a single carbohydrate pathway, so keep it near 60 g per hour or pair it with a fructose-containing product if you fuel higher. Practice it on at least two long runs first.
How many GO Isotonic Energy Gel should I take per hour?
2.5 servings per hour gets you 60 g of carbohydrate; 4 gets you 90 g. Each serving is 22 g. Space them evenly rather than front-loading.
Does Science in Sport GO Isotonic Energy Gel have caffeine?
No. It is caffeine-free, so you can take it every serving without stacking caffeine.
How much sodium is in Science in Sport GO Isotonic Energy Gel?
4 mg per serving, which is low for a gel. Heavy sweaters should add an electrolyte source.
Is Science in Sport GO Isotonic Energy Gel vegan and gluten-free?
Vegan: yes. Gluten-free: yes. Both come from the manufacturer's published data.
Why does Science in Sport GO Isotonic Energy Gel score 73/100?
Carbohydrate quality: 22/45. Single-source glucose/maltodextrin, reliable, but absorption is capped near 60 g/h without added fructose. Carbohydrate dose: 20/20. 22 g carbs per serving, a full working dose for a gel. Race-appropriate (protein-light): 20/20. No protein, ideal for during-race carbohydrate delivery (nothing slowing gastric emptying).
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