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SiS GO Isotonic Energy Gel - 6 Pack

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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

  • • Truly isotonic formulation - no need for water
  • • 22 grams of rapidly absorbed carbohydrate per gel
  • • Convenient easy-to-take format
  • • Contents: 6 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 endurance athletes. Use during endurance sessions and events to help avoid flagging.

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)


GO Isotonic Gels - Pineapple

GO Isotonic Gels - Pink Grapefruit

GO Isotonic Gels - Apple

GO Isotonic Gels - Orange

GO Isotonic Gels - Tropical

GO Isotonic Gels - Blackcurrant

GO Isotonic Gels - Cherry

GO Isotonic Gels - Chocolate

GO Isotonic Gels - Lemon & Lime

GO Isotonic Gels - Vanilla

GO Isotonic Gels - Fruit Salad

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 Immune?

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 Energy products e.g 1 x GO Isotonic Energy Gel and 1 x 500ml 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'?

GO Isotonic gels contain natural flavourings.


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

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, Gels do not contain aspartame.


Will they fit in my cycle jersey pocket?

Yes! All 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.


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Verified Reviews

Rated 4.8 out of 5 based on 114 Reviews
Kevin Pegden

As above great help when strength is getting low


Sickly sweet

Mark Pierce

Taste great

Matthew Lee

As expected


Easy to use tasty Gels, work well for me..


Better than expected


Nice flavours and easy to consume


Good product - very useful extra energy for those long challenging rides!


Very helpful on longer runs/rides


Does as advertised and tastes good too!


Excellent product


great product as always when you feel you just need that little bit more on a longer ride....


Used these before and they are perfect for that energy kick to get you through exercise

Simon Sharman

This energy gel gives the boost to my workout, however the sachet is impractical. The tear strip is too tough and won’t tear so you need both hands to squeeze the gel out. You can’t use this ‘one the move’. Likely I’ll switch to Bloks as more practical and less messy. Shame!

Uhzair Naheem

Not nice at all

Simon Winton



Tastes brilliant


Really good quality and taste.

Ian Davenport

Refreshing and a change of flavour.


My favourite flavour

Anita Howe

Always great products and quick delivery


A trusted product that works for me.

Mathew Beaumont

This product is game changing just like everything else from SIS

Andy Mitchelson

Nice as always


Good product - very useful extra energy for those long challenging rides! Nice flavours too.

Caz R

The orange is the best flavour ive had, since having the gels ive found i can run at my faster paces for a lot longer.

Mrs Nichola Fish

Training for half marathon and use these to keep me going. They don’t upset my stomach so would recommend.


Easy on the stomach


Excellent as always

Maria Golden

No after taste

Alan Wallace

Used as part of my training nutrition and for my 100 mile charity ride, which was a total success.


best before dates are less than 6 months , they don't give this information on their web sites . 15 days after purchasing, they have done 60% off. Bad price management and poor customers service.

Lewis Bone

Good stuff

Nick (MOT)


David Major

Good, but not as tasty as pink grapefruit

Andrew Medforth

Great on longer rides. Gives a good boost when you start to tire.

Clive Robinson

Nice orange flavour

Craig Tibbetts

Great product, never had an gi issues with it

Graham Walters

I have been enjoying the Go Isotonic for years but the bars are new to me and are very good.

Jim Mallon

Great taste.

stefano Baldoni

It fill like pineapple pulp. Give me a strong power and I can use 5 or 10 and never fil nauseate


Lovely flavour


Great flavour! Not as sweet as Cherry. It's a nice flavour if you don't want a taste shock!


Good flavour

Mr D Burgess

Worlds well and tastes good


Tastes good and gave me the kick I needed


Bloody good stuff


Perfect energy supply easy to digest when on bike rides 2 hours +

Peter Burr

geat before the gym or when out cycling


sis gels enjoy makes you wish you were going further

Rami Khateeb

amazing ...


Ottimi gusti


buonissimo prodotto




I rely on these gels for all of cycling activities regardless of the length or stresses involved. So easy to consume on the move and give you that much needed boost.


Prodotti super testati da parte mia, a mio parere i migliori in commercio


Avuto in regalo

Caz R

Great taste, easy to digest, great for running.

Daniele Migliore

Tra i miei gusti preferiti


Prodotti fantastici


Gel pratico nell’utilizzo ed efficace allo scopo. Top.👍

Luigi Brugnoli

Adoperati anche stamattina. Digeribili e gradevoli

Guido Alfredo Muscari

Ottimo prodotto

Eteocle Garbaglia

Prodotto migliore in commercio

Maurizio Gilardoni

Ottimo prodotto di facile assimilazione, da migliorare l’apertura. Consigliato


Ottimi nel gusto e facilissimi da assimilare


Gusto gradevole

Julius Chang

Great taste

Daniele Invernizzi

Prodotto molto valido, aroma percettibile e non zuccherato. In pratica anche quando fa molto caldo, lo posso assumere sotto sforzo (run o bike ) senza acqua, non lascia quella sensazione di appiccicoso unita alla necessità di bere che ho provato con altri gel.

Andrea Moltrasio

Gusto gradevole Di buona efficacia

Davide Bergonzi



Tastes good and always easy to take whilst riding.

Craig Tibbetts

Great product, good taste


Helps on a long turbo session.

Peter Burr

Great before going to the gym or when out cycling.

Five aday

Easy to digest on the go, nice flavour.


Very good for when I’m doing long distance runs!


Nice product good taste ...

William Lee

Great product delivered very efficiently


Really good product and reasonable price


gel dal sapore gradevole e non troppo dolciastro. Confezione facile da aprire


molto buono provato sia per trail che per corsa su strada ottima resa


Ottimo gusto fresco...tra i miei preferiti


All right, very good gel!

Steve Kennedy

Easy to take product which works for me. Nice flavours and easy to swallow on the run.

Carl Gardner

Has the desired effect, and tastes good


Excellent flavour! Good source of energy in endurance sports.

Guest Brendan Minihane

Stomach friendly portable fuel.

Cristiano Parzani

Good taste and easy to assume. Digestible.

Customer Bob.F

Nice flavour Not sure whether it's banana, mango, pineapple or a combination


Best tasting gel - love love love !

Neil Dixon

Really really nice gels. The best flavour They do.

hugh sergeant

Best flavour takes the pain away

Bethany Brown

Tasty product , great flavour

Rick Nimbley

Probably one of my favourites, great taste!


Loved it- I preferred Rhubarb and Custard and Vanilla but this is really nice too- a welcome change from the usual orange/berry flavours.

Malcolm Elders

Great flavour. Takes your mind off what it is.

Peter Burr

Great before the gym or when out cycling.

Matthue Levitt

This flavour surprised me. It was a lot better than I expected. Up there with one of my favourites.


Avoid cramping late in the match with this ...

michael majhu

Great value for money

Paul Renton

Always good avoid the bonk make sure you have yours.

Heather Doak

Great flavour

Chris R

Useful but I find the texture cloying and a bit hard to swallow.

K Harrison

Very easy to take and a decent flavour too.


Best out of all flavours love these