In stock
Product Code

SiS GO Isotonic Energy Gel - 20 Pack

Save 30%
Was £21.00 Was £30.00

View Product
gluten free
wheat free
dairy free
nut free



Product Information

The GO Isotonic Energy Gel was the world's first isotonic gel effectively delivering an easily digestible and quick supply of carbohydrate for energy during exercise.

They are designed to be consumed without water, minimising the risk of being bloated that can sometimes occur with over-drinking.

Provides you with 22 grams of carbohydrate per gel.

Key Features

  • • 22 grams of rapidly absorbed carbohydrate per gel
  • • Convenient easy-to-take format
  • • Contents: 20 x 60ml gels per pack
  • • Flavoured Maltodextrin gel with added sweetener.


Winner of the Queens award for enterprise, this innovative product continues to be seen at the forefront by professional football players. Use pre-game and at half time to top-up carbohydrate stores.

Product Uses
Recommended Usage

Consume 1-3 gels per hour to deliver approximately 60 grams of carbohydrate and maximize carbohydrate utilization rates. Where hydration is also important, SiS GO Isotonic Gels can also be consumed with SiS GO Hydro or with SiS GO Electrolyte to ensure a combination of both energy and fluid delivery during exercise.

Directions for Use

Simply tear off the top of the packaging and consume - there is no need to mix with water.


Depleting your carbohydrate stores during exercise is one of the major causes of fatigue. Delivering additional carbohydrate during exercise is known to improve performance, race times and delay the onset of fatigue.

The Isotonic formula allows the gel to empty from the stomach quickly as no fluid needs to be drawn into your stomach to dilute the gel, providing fast energy. SiS GO Isotonic Energy Gels are highly practical and can easily be carried without the requirement for bulky bottles.

Informed Sport Registered

Our complete product range is developed using a world-class approach to banned substance testing, providing assurance for athletes. For more information on Informed Sport & our unique world class approach, click here.

Suitable For: Vegans, Vegetarians, Lactose free, Gluten Free, Wheat Free, Nut Free, Soya Free

Nutritional Info

For nutritional information about the individual flavours please contact customer service. Example below is for Orange flavour.

Typical ValuesPer 100mlPer Serving 60ml
Energy 613kj/144kcal 368kj/87kcal
Protein 0.0g 0.0g
Carbohydrate 36g 22g
of which sugars 1.0g 0.6g
Fat 0.1g 0.0g
of which saturates 0.0g 0.0g
Fibre 0.1g 0.0g
Salt 0.01g0.01g


Water, Maltodextrin (from Maize) (33%), Gelling Agents (Gellan Gum, Xanthan Gum), Natural Flavouring, Acidity Regulators (Citric Acid, Sodium Citrate), Preservatives (Sodium Benzoate, Potassium Sorbate), Sweetener (Acesulfame K), Sodium Chloride, Antioxidant (Ascorbic Acid)

Read More

When should I consume these?

Consume 1-3 gels per hour during endurance exercise to maximise carbohydrate utilisation rates. Alternatively, take one halfway through repeated high intensity exercise (such as football or rugby) to rapidly replenish glycogen stores.


When should I have these versus Electrolyte, Caffeine or L-Carnitine gels?

These should be consumed when you need a fast, convenient energy boost. During endurance exercise lasting over 90 minutes, these should be the main gels that are used throughout a race. Use in combination with other SiS Energy products e.g 1 x SiS GO Isotonic Energy Gel and 1 x 500ml SiS GO Electrolyte to hit 58 grams of carbohydrate (per hour).


Is this gel Isotonic?

Yes, this gel was the first truly isotonic energy gel.


Are these 'natural'?

SiS GO Isotonic gels contain natural flavourings.


Why are these better than regular foods, for example a banana?

SiS GO Isotonic Energy Gels are designed to be absorbed fast into your gut, providing fast energy. Some solid foods can take a while to digest as there's more fat and fibre in whole foods, which during exercise can cause feelings of bloating and discomfort.


Do these contain aspartame?

No, SiS Gels do not contain aspartame.


Will they fit in my cycle jersey pocket?

Yes! All SiS GO Gels are lightweight, compact and designed to fit in jersey pockets, cycle bags and waist packs. They are pressure tested, so don't worry about the packaging tearing or bursting during exercise.


You may also like
We found other products you might like!

Verified Reviews

Rated 4.7 out of 5 based on 106 Reviews
Simon Butteriss

Good isotonic fuel, packaging good on the go


Didn't work for me - stomach cramps, low energy, almost didn't finish the marathon race.



Paulo Felix

Great flavour, easy to use, never ad stomach problems.

Darren Kerry

Gives you a boost just when you're going to need it

Mr. Simon Lynch

Excellent sport training product


Easy to absorb even in hot weather (25-30C).

Michael Meaney

Definitely give you that needed boost during a race. The thickness of the gel is such that I dont actually enjoy taking them but it’s benefits outweigh that.


Love the new vanilla flavour, tastes great and the gels go down easy without any stickiness left in the mouth afterwards.

Peter Brown

Really useful when out on the bike for a quick pick me up. Taste is always great and had no problems to date.


N/a. I can’t review this when I didn’t get any.

steve gibbons

Just spot on always gives you that bit extra

Paul Bartlett

Excellent gel with practical wrapper. Have seen other wrappers that keep the removed top connected so does not litter by accident. Please improve.


I can’t be without these gels.. you gotta use them, so you might as well get the ones that taste best, as well as doing the job.


Have used GO isotonic gels for many years now and have found them to be the best

Alan Jackson

Use Isotonic gels for Manchester marathon along with half marathon races and I never felt depleted in engery. Great product easy to use whilst running and no need for water

Eric Blatherwyke

Brilliant! tasty and effective. I spread them on my toast before going pout for a ride. Not really, but they really are good - so I'd heartily recommend.

michelle lovatt

Bought these for my son as got some at a reduced rate as in great north run and he really liked them and felt gave him a boost. Gels I’ve had in past have always made me feel sick but I tried and no sickness with these.

Russell Dorsett

This is by far the best energy gel I have ever used and the Apple flavour is the most palatable one in my option, goes down easily and definitely gives you boost when needed. Have been a client of SiS for 20 years plus so that must say something.

Patrick Faure

The finisher! At the end of the ride, when exhausted, and yet, you still have to ride home, the apple gel is truly the best.

martin bare

Don’t know as never actually got the product and still waiting for my refund.


Speedy efficient

David Mclean

Great product for a quick energy boost

Andy (North-East)

Apple dapple, great flavour

Mr Matthew Whattam

Perfect for my races

Daniel Rose

Good product


Perfect Tasting gels


Good value

Patrick Faure

The energy of summer in a small package. Great taste and excellent performance support


Excellent product and service.

Neil Forrester

Great product & value

Martin, Glasgow

Tasty and great boost mid ride

ben roose

i didn't received my order


For a quick energy boost on the go, these really do work.

steve gibbons

Love these, always gives you that bit extra

tony hambrook

When you hit a wall and take this wow so much energy . Could not manage with out it


Quite a decent taste

Richard Best

I take 1 gel when I leave the house and find for a 1.5hr ride it's perfect. I have more energy and can work harder for longer. The longer rides I will take 1 -2 geks with me for added confidence.

Heather Jones-LittleWoodCompany

Great product - love the cherry 🍒


Best energy gels on the market.

Martin, Glasgow

Best flavour gel imo. Like a cheery bake well in gel form! No nasty aftertaste.

Simon Butteriss

As good taste as gels get, easy to consume on the go and not too sweet


Easy to absorb. Will use more.

Dean Forrester

Very good as always

Laurence Frazer

Very good product


Good product,,good price,,all good,,

chris thompson

Great deal, gets me through my mtb rides 👍🏼


This stuff is great. Good price. When u out on a long ride and need some extra energy these are just the job. Easy to use on the the go. Depending on your preference I like them all apart from orange.. But taken at the right times see Google for the timing of them. They are brilliant


I’ve tried the cheapo Wiggle and wasn’t a big fan so reverted back to using these.

Steve hurt

V v v v v v god

adam thomas

Great product

gerald jenkins

Amazing taste a good boost for energy

Gary fron london

Great product been using them for years

Nasser Mansor

Easy to consume during training and race day. Taste good and give energy within seconds. Easily consume without drinking water 👍

Henry Morgan

Seem to do the job very well

Ian Hawkins

Use for training/ races half marathon and above. Easy on the stomach and provide the boost, both physically and mentally that is required.

Ms Mistry

Not quite as nice as the orange but I liked them.

mark davies

Quick delivery

Jean Terry

Just what I need for my biking

Graeme Jinks

More jelly like than other similar products.

Charles Mayo

I love lemon. Tastes perfect

Mr Alastair Paramore

AS described. Works well for me


Good value for money


Does exactly what you want it to do, pleasant tasting, easily digested, instant energy gel in a one dose package, ideal

Dear Mr Robinson

It's one best around to used when I out on my bike or running

Mrs Parker

Very useful when running

Lost in space

As a long distance cyclist I always use sis gels, i find the taste good and they are not loaded with sugar like others.

Chas Lilley

Top notch 👌🏻


I will not write ten characters! You are chasing my feedback too much. Going forward I will buy another companies product.

Mr Connor Mulholland

Good product


Great service at a great price.


Good quality

Heather Doak

Great value pack. Instant energy.

Una Cosgrave

does the job good flavour


Like the consistency of the gels, not overly sweet like normal gels.

Ally Christie

Used this product while endurance training in Scottish Mountains. Kept my energy levels constant , and when I felt myself flagging I took a gel sachet which restored my energy levels so I could then think straight whilst training in low light and bad weather so kept alert while navigating through tough terrain.

Tanya Williams

Great value


good stuff


I prefer Apple or Lemon/Lime flavour. But even this is very good during cycling


Good taste and very effective.

Tom Davidson

not too bad at all for a gel



Paul Farrell

Num, Num…Num.

Robert Brannock

All very good

Natalie Bailey

Favourite flavour for me 👍🏻


Gotta have em..

Richard Granger

Really nice flavour, refreshing and easy to digest

Carl Harry

Nice flavour easily taken

Maria Nääb

Super quality and great service

Lorne Crawford

Nicest gels I’ve tasted

Lisa Moran

Tastes amazing, just what is needed on long distance run!

Jeremy Sargeant