Science In Sport GO Isotonic Energy Gel 60ml - Single Unit (Fruit Salad)

Gel
22 g carbs per serving
From Science In Sport's label

The short answer

Science In Sport GO Isotonic Energy Gel 60ml - Single Unit (Fruit Salad) has 22 g carbs, 10 mg sodium per serving, from R44 a serving at the cheapest size. Value score 2.9/10 (poor value).

Carbs22g

Sodium10mg

CaffeineNone

Per servingR44

About it

Easily digestible by the stomach providing energy fast. No need for additional water. Convenient form-factor for versatile fuelling. A liquid carbohydrate energy gel created using maltodextrin. Officially the World's first Isotonic Energy Gel and Winner of the Queen’s Award for Enterprise in 2015. It continues to be a go-to energy source for elite athletes worldwide.

Used as part of your fuelling strategy
the GO Isotonic Energy Gel can help you maintain your pace for longer
Isotonic formula means no need for additional water or fluids
Easily & quickly absorbed by the stomach
providing energy fast
No artificial flavours

Decision helper the numbers athletes compare

Value score2.9/10Poor value

Cost score against the Endure average	3.4/10
35 products in the category	+1.07σ
Requires >2 servings/hr to hit 60 g	-0.5
Value score	2.9/10

About $0.108 a gram of carbs, at R18.50 to the dollar.How we score ›

Price per g carbR2Poor value · 3.4/10Cost vs live Endure average (z-score)41% pricier than the category average

Price per 100 g carbR200Premium / PoorCost to buy 100 g of carbohydrate fuel — easier to compare than per-gram

Carb density36,7%Drink-likeCarbs as % of serving weight — affects gut load

Sodium per 100 kcal11 mgPremium / PoorElectrolyte adequacy vs 300–600 mg Na/hr target

Caffeine per servingNoneStimulant dose per serving

Servings for 60 g an hour2,7AverageServings/hour to hit the 60 g/hr fuelling target

On the label per serving, 60ml

Energy	87 kcal
Carbs	22 g
Sugar	0.6 g
Protein	0 g
Fat	0 g
Sodium	10 mg
Potassium	0 mg
Caffeine	0 mg
Carb type	Maltodextrin
Glucose to fructose	1:0
Carb sources	Maltodextrin

Who it suits and where it falls short

Who it is for

This product is ideal for endurance athletes who require rapid energy delivery during their activities. It suits marathon runners tackling long training runs, cyclists on extended rides exceeding two hours, and triathletes needing quick carbohydrate replenishment during races. The isotonic nature makes it convenient for those who prefer not to carry additional water, such as trail runners navigating technical terrain where hydration access is limited.

Best sessions

90min tempo run, 2hr cycling endurance ride, 3hr long run, brick workout (bike-run), half-marathon race pace session

Pros

Isotonic formula eliminates need for extra water.
Rapid absorption due to maltodextrin.
Convenient single-serving package.
No artificial flavors enhance natural taste.
Low sugar content reduces risk of GI distress.

Cons

Single-source carb limits absorption rate.
Low sodium content may require additional electrolyte supplementation.
High cost per gram of carbohydrate.
Lack of fructose limits dual transporter usage.

Race day

How to use it, by distance

For a 5k, the gel may not be necessary due to the short duration. Focus on pre-race nutrition instead.

The science in short

Primary use

Best used during mid-length endurance sessions where rapid energy is needed without additional hydration.

Isotonic — The gel is designed to match body fluid osmolality, ensuring rapid gastric emptying and absorption without causing dehydration.

The GO Isotonic Energy Gel is a convenient option for athletes needing quick energy without additional water. Its isotonic formula is a significant advantage, but the single-source carbohydrate limits its overall effectiveness for longer events requiring higher carbohydrate intake. The low sodium content also necessitates additional electrolyte supplementation. While it is a solid choice for shorter or mid-length sessions, athletes should consider pairing it with other carbohydrate sources for optimal performance in longer events.

Why it works

The use of maltodextrin as the primary carbohydrate source allows for rapid gastric emptying and absorption through the SGLT1 transporter. The isotonic nature ensures that the gel does not draw water into the gut, preventing dehydration. However, the lack of fructose means that the GLUT5 transporter is not utilized, limiting maximum carbohydrate absorption to around 60g per hour.

The trade-off

The main downside is the single-source carbohydrate, which limits the total carbohydrate absorption rate. Athletes may need to consume multiple gels or supplement with other carbohydrate sources to meet higher energy demands.

Serving

At R44 per 60ml serving, the cost per gram of carbohydrate is relatively high, especially given the single-source nature.

Carb density

0.367g/ml, which is typical for isotonic gels but lower than concentrated gels.

Carb matrix

Single-source carb, relying solely on maltodextrin, limiting absorption to SGLT1 pathways.

Carb types

Maltodextrin — glucose pathway (SGLT1)

Electrolytes

Contains 10mg of sodium, which is low compared to typical sweat losses of 300-600mg/hr, necessitating additional electrolyte supplementation.

Glucose to fructose

1:0 — Limits absorption to around 60g/hour due to lack of fructose.

Hourly capacity

3 gels = 66g carbs, within 60-90g/hr ceiling

⚡ High spike risk — best mid-effort. Risk of rebound hypoglycemia.
🔒 Single-source carb — limited to ~60g/hour via SGLT1 only.

Using it in training and racing

Flavour and feel

acidity: moderate — Balanced acidity that enhances the fruit flavor without overwhelming.
summary: After a long run, the gel's light texture and refreshing taste were a welcome energy boost without needing extra water.
texture: The gel requires moderate pressure to squeeze out, dissolving quickly in the mouth without residue.
mouthfeel: gel-like — Smooth texture with a slight thickness, easy to swallow without water.
sweetness: moderate — Comparable to a diluted sports drink, not overly sugary.
aftertaste: clean — Leaves a refreshing finish without lingering sweetness.
available flavors: Fruit Salad

How to train your gut

tips: Start with small doses to assess tolerance., Practice timing to avoid GI distress., Pair with electrolyte drinks for longer sessions., Use in training to avoid surprises on race day.
week 1: Consume 1 gel during a 60-minute run twice a week to start adaptation.
week 2: Increase to 2 gels during a 90-minute session, focusing on timing and pacing.
week 3: Simulate race conditions by consuming 3 gels during a 2-hour run at race pace.
week 4: Perform a full race rehearsal, using 4 gels over a 3-hour session, mimicking marathon conditions.

Mixing

As a gel, no mixing is required. Simply tear open the sachet and consume directly. Ensure to practice during training to gauge personal hydration needs, especially in hot conditions.

Heat and cold

In heat, the gel may become more fluid, making it easier to consume but potentially messier. In cold conditions, it may thicken slightly, requiring more effort to squeeze out. Freezing is not recommended as it can alter texture.

Packaging

Features a tear notch for easy opening, suitable for one-handed use. Minimal sticky residue, fits well in running belts and cycling jersey pockets.

Sustainability

The packaging does not provide specific information on recyclability or sustainability practices. Athletes concerned with environmental impact should consider this when choosing products.

Pairs well with

Electrolyte tablets for sodium supplementation.
Fructose-based gels for dual carb absorption.
Hydration packs for longer endurance sessions.

What other athletes say

The isotonic formula is highlighted as a key benefit for rapid absorption (source: product description).
Maltodextrin is noted for its fast-acting energy delivery (source: product description).
The gel's convenience is emphasized by its single-serving packaging (source: product description).
The low sodium content is a consideration for athletes with high sweat rates (source: nutrition facts).

In depth

## Who It's For

The GO Isotonic Energy Gel is tailored for endurance athletes who need a quick and efficient carbohydrate source during their activities. It's particularly beneficial for marathon runners, cyclists, and triathletes who engage in sessions lasting over 90 minutes. The gel's isotonic nature means it can be consumed without additional water, making it ideal for athletes in situations where hydration access is limited, such as trail runners navigating technical terrain.

## Inside the Formulation

This gel is primarily composed of maltodextrin, a fast-acting carbohydrate that provides 22 grams of energy per serving. The isotonic formula ensures that it is rapidly absorbed without drawing water into the gut, preventing dehydration. However, the single-source carbohydrate limits the gel's absorption rate to approximately 60 grams per hour, as it only utilizes the SGLT1 transporter. The absence of fructose means that the GLUT5 transporter is not engaged, which could limit the gel's effectiveness during prolonged endurance events.

## On Course: How to Use It

For optimal performance, consume one gel 10 minutes before starting your activity to top off glycogen stores. During a marathon, aim to take a gel every 45 minutes to maintain energy levels, targeting around 60 grams of carbohydrates per hour. The gel's low sodium content means that additional electrolyte supplementation may be necessary, especially for athletes with high sweat rates.

## How It Compares

Compared to other energy gels, the GO Isotonic Energy Gel stands out for its convenience and rapid absorption due to its isotonic nature. However, it falls short in terms of carbohydrate diversity, as it relies solely on maltodextrin. This limits its absorption capacity compared to multi-source gels that combine glucose and fructose for dual transporter utilization.

## Training Your Gut

To maximize the gel's benefits, incorporate it into your training routine. Start by consuming one gel during a 60-minute run twice a week to assess tolerance. Gradually increase to two gels during longer sessions, focusing on timing and pacing. Simulate race conditions by using three gels during a 2-hour run at race pace. Finally, perform a full race rehearsal, consuming four gels over a 3-hour session to mimic marathon conditions.

## The Verdict

The GO Isotonic Energy Gel is a convenient and effective option for athletes seeking rapid energy delivery without the need for additional water. Its isotonic formula and ease of use make it suitable for mid-length endurance sessions. However, the single-source carbohydrate limits its overall effectiveness for longer events requiring higher carbohydrate intake. Athletes should consider pairing it with other carbohydrate sources for optimal performance in longer races. The low sodium content also necessitates additional electrolyte supplementation, particularly in hot conditions or for those with high sweat rates.

Sizes and where to buy

SizePricePer servingBuy

Single1 × 1 servingR44R44Buy ›

Questions about GO Isotonic Energy Gel 60ml - Single Unit (Fruit Salad)

How many carbs are in Science In Sport GO Isotonic Energy Gel 60ml - Single Unit (Fruit Salad)?

22 g of carbs per serving (60ml), with 10 mg sodium, from Science In Sport's label.

What does Science In Sport GO Isotonic Energy Gel 60ml - Single Unit (Fruit Salad) cost per serving?

From R44 a serving at the cheapest size, which buys 5 g of carbs per R10.

How many gels should I consume during a marathon?

For a marathon, aim to consume one gel every 45 minutes. This will help maintain energy levels and provide approximately 60 grams of carbohydrates per hour, which is within the optimal range for endurance performance.

How does this gel compare to its main competitors?

The GO Isotonic Energy Gel is unique for its isotonic formula, which allows for rapid absorption without additional water. However, it uses a single-source carbohydrate, unlike competitors that offer multi-source options for enhanced absorption.

Does this gel contain caffeine?

No, the GO Isotonic Energy Gel does not contain caffeine. Athletes looking for a caffeine boost will need to supplement with other products.

How should I store the gel in hot weather?

In hot weather, store the gel in a cool, shaded area to prevent it from becoming too fluid. Avoid direct sunlight to maintain its consistency and effectiveness.

Can the gel be frozen for storage?

Freezing is not recommended as it can alter the gel's texture and make it difficult to consume. Store at room temperature for best results.

How can I train my gut to handle this gel?

Start by consuming one gel during shorter training sessions to assess tolerance. Gradually increase the number and frequency during longer runs to simulate race conditions and adapt your gut.

Is the gel vegan and free from common allergens?

The gel does not contain any animal-derived ingredients, making it suitable for vegans. However, always check the packaging for specific allergen information.

What are the side effects of consuming too many gels?

Consuming too many gels can lead to gastrointestinal distress, including bloating and diarrhea. It's important to follow recommended dosing and practice during training to find your personal tolerance.