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SiS Mixed GO Isotonic Energy Gels - 20 Pack

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Was £28.00 Special Price £14.00

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  • Contents: 4 x each flavour GO Isotonic Energy Gels (Orange, Tropical, Blackcurrant, Lemon & Lime, Apple)
  • The GO Isotonic Gel is the world's first isotonic gel effectively delivering an easily digestible and quick supply of carbohydrate for energy during exercise. 
  • GO Isotonic Gels are designed to be consumed without water meaning that you can ensure rapid delivery of carbohydrate to your muscles
Delivery Details

UK Delivery Information*

  • Free Standard Delivery over £35 (2-4 Days)
  • Standard UK Delivery (2-4 Days) - £3.99
  • UK Next Day Delivery (Restrictions Apply) - £4.99
  • SiS Premier - Unlimited Next Day Delivery for 1 Year - £9.99
Full Details & International Delivery


Product Information

The GO Isotonic Gel was the worlds first isotonic gel effectively delivering an easily digestible and quick supply of carbohydrate for energy during exercise. GO Isotonic Gels are designed to be consumed without water meaning that you can ensure rapid delivery of carbohydrate to your muscles without the feelings of being bloated that can sometimes occur with over-drinking.

Key Features:

  • • Truly isotonic formulation - no need for water
  • • 22 grams of rapidly absorbed carbohydrate per gel
  • • Convenient easy-to-take format
  • • Contents: 20 x 60ml gels per pack
  • • Tropical, Orange, Lemon and Lime, Apple and Blackcurrant flavoured Maltodextrin gel with added sweetener.
  • • Suitable For Vegans.

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 nutitional information about the individual products within this pack, please see the relevant product page for each product. Example below is for Pineapple 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) 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)

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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 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 20 Reviews
Vanessa Lara

These little gels are surprisingly tasty and they do give you a good boost to keep you going. Super for cycling routine.

Nick Cleary

Can’t fault the product. I was able to pick the flavours that I want and while the gels will be consumed quickly anyway all came with lengthy best before / use by dates. They are well packaged in a box that it is easy to gain access too and close again.

Ali Yarwood

Got me through the Great South Run and all the longer training runs. Flavours are pretty good, looking forward to the new flavours in the next selection box maybe? Would have given 5 stars but a few of these gels have been rather lumpy - doesn't seem to affect performance but a lot less palatable.


I got a great deal on this SiS Isotonic bundle. Great flavours and enough to last me a ton of rides.. I’ll be buying more soon though because the Autumn deals are great! Easy to digest and fast acting..


Lieferung war Okay, gerne wieder

Dean O'Shaughnessy

Knew exactly was I was getting having used before, particularly for running 10k+. 40% Discount at the time was most welcome. Tend to use cheaper products for training bit these are always my go to for hot weather or events.

Gellert Vinnai

great product for cycling


easy taking & a decent range of flavours

Jakub Papciak

Item as per description. Fast delivery. Recommended.

Jackie Hibbert

Great product at a great price

neil lewis

Great flavours easy to swallow while on the move


Less taste, less sweetness, but effective.

David Healey

Good product with good choice of flavours excellent price

Mr Darren Moore

Great selection box if you’re unsure which flavours you would like.

Richard Perkins

Great product but had some split which was messy!


Best on the market. Always my go to after trying pretty much every other option either through purchasing or receiving at gel points during races. Always nice to see SIS are sponsoring an event and supplying gels.

Stephan Mehr

Excellent product and highly recommended

sandy miller

The first gels I have used that have been easy to consume without water.

Anthony York

Does what it says on the box

Chloe Singer

This is probably just me.... But I didn't like the consistency of the gels and they really upset my stomach on long runs. The flavours were a bit sickly too. I love the concept of isotonic gels, but they just didn't suit me