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SiS Hydro Tablets

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gluten free
wheat free
dairy free
nut free
Delivery Details

UK Delivery Information*

  • Free Standard Delivery over £30
  • Standard UK Delivery (3-5 Working 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


Hydro is designed to ensure you are effectively hydrated to produce your best performance. As an effervescent tablet that readily dissolves in plain water, it represents a highly practical approach (simply drop one tablet in your 500 ml water bottle) without the calories.

Hydro meets your sodium requirements at a specific concentration (30mmol/L) that is scientifically proven to produce superior hydration compared with water alone. It was developed to keep the British Sailing team optimally hydrated at the 2008 Beijing Olympics. Simply drop a tablet into water for effective hydration, with virtually no calories, before and during sports.

Key Features

  • • Simply drop in water to provide a high electrolyte drink
  • • High in sodium to help promote hydration
  • • When hydration is required without the added calories
  • • Contents: 20 x 4.3g Tablets

Hydro + Caffeine

The addition of 75mg of caffeine has been repeatedly shown by sport scientists to improve performance by providing both a physical and mental boost.

Key Features:

  • • Simply drop in water to provide a high electrolyte drink
  • • High in sodium to help promote hydration
  • • 75mg caffeine content
  • • Contents: 20 x 4.3g Tablets

Product Uses
Recommended Usage

Consume 500ml of SiS GO Hydro 3-4 hours prior to your event with a further 250-500ml in the hours before starting. During exercise of a shorter length where carbohydrate intake is not necessary, consume 500 ml of SiS GO Hydro per hour. If aiming to combine hydration and energy delivery, consume SiS GO Electrolyte with the SiS GO Gel range.

Directions for Use

Add 1 SiS GO Hydro tablet to 500ml of water and let it dissolve. Once prepared consume within 24 hours. Do not consume more than 4 tablets per day.


Electrolytes including sodium, potassium and magnesium are lost through sweat and need to be replaced in order to help the body maintain fluid balance, alongside an appropriate fluid intake.

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 nutritonal information about the individual flavours, please customer services. Below are two examples flavours.


Typical Values                                                                        Per 100g                                              Per Tablet 4.3g                                            
Energy 824kj/197kcal 40kj/9kcal
Fat 0.0g 0.0g
of which saturates 0.0g 0.0g
Carbohydrates 17.7g 0.8g
of which sugars 1.1g 0.1g
Fibre 4.4g 0.2g
Protein 0.0g 0.0g
Salt 19.2g 0.9g
Calcium 2267mg 102mg
Magnesium 180mg 8.1mg
Potassium 1444mg 65mg


Citric Acid, Electrolytes 37% (Sodium Bicarbonate, Sodium Chloride, Calcium Carbonate, Potassium Chloride, Tricalcium Phosphate, Magnesium Carbonate), Sorbitol, Inulin, Colour (Beetroot Red), Natural Flavouring, Elderberry Powder (2.3%), Starch, Sweetener (Sucralose), Vitamins (Pyridoxine Hydrochloride, Riboflavin, Thiamin)


Typical Values                                                                       Per 100g                                                          Per Tablet 4.3g                                                        
Energy 796kj/190kcal 36kj/9kcal
Fat 0.0g 0.0g
of which saturates 0.0g 0.0g
Carbohydrates 21g 1.0g
of which sugars 1.1g 0.1g
Fibre 4.9g 0.2g
Protein 0.0g 0.0g
Salt 19.2g 0.9g
Caffeine 1167mg 75mg
Calcium 2267mg 102mg
Magnesium 180mg 8.1mg
Potassium 1444mg 65mg


Citric Acid, Electrolytes 37% (Sodium Bicarbonate, Sodium Chloride, Calcium Carbonate, Potassium Chloride, Tricalcium Phosphate, Magnesium Carbonate), Sorbitol, Inulin, Natural Flavouring, Starch, Caffeine (75mg), Colour (Caramel E150d), Maltodextrin, Sweetener (Sucralose), Vitamins (Pyridoxine Hydrochloride, Riboflavin, Thiamin Hydrochloride)


GO Hydro + Caffeine - Cola

GO Hydro - Berry

GO Hydro - Lemon


GO Hydro - Pineapple & Mango

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.


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Verified Reviews

Rated 4.7 out of 5 based on 63 Reviews
Little Bully

Add a little Zing to your ride :-)

Kelly McPherson

very handy to have on you to mix up additional bottles if needed


Great flavour, great delivery, great Customer Service


Very pleased with this product

Keith Carver

Great product, great taste use on every cycle ride. Tried cheaper alternatives but these are the best.


Great value for money - Ok taste.


semplice rapido compatto per semplici pedalate

Marco Bisaglia

It's a very useful product in summer, to reintegrate the loss of salts

Tracy O Reilly

Taste wasn’t great lemon tasted better

Paul M

Nice flavour. Nice! Recommended.


Do not like berry’s. I’ll try another next time

Mr. Simon Lynch

Excellent sport training product

Will Quinn

My wife's favourite hydration,great for long bike runs.

Steve Bones

These hit the spot both flavour is good

Wayne Burridge

Not over keen on Berry flavour but have used this product before and do like it


Tasty and full of natural energy. I don’t ride without them!


Good product, easy to use, good taste


Love these. Especially during hot weather

Oliver Jackson

Great taste and hydrates well.


Great product. Tastes good and does the job I need it to

Andy Saunders

Excellent product for replacing lost electrolytes.

Paolo Corrias

excellent, easy to melt in water


Love these, great flavour, do exactly what I need them to.


Quality product at a sensible price.


Refreshing and don’t taste of chemicals like many do.

Tracy O Reilly

Tastes really nice easy to drink

Paul M

Subtle lemon taste. My favourite.




Notevole la possibilità di utilizzo.


Tastes good, virtually no calories. What more could you want?

Will Quinn

My favourite flavour and brilliant for 40 mile plus cycle runs .

constantinos christodoulou

Very good price for this product

Steve Bones

Favourite flavour on these they do the job well.

Carwyn Wooldridge

Nice Hydro Tablet & work well.


Having to go middle of the road as i havent tried yet. Finishing off last pack of berry flavoured.


Great taste not to sweet just right

Oliver Jackson

Hydrates very well and quite refreshing.

Mr Allinson

Great Taste fine and no problem with stomach

Kevin --

Nice Tate and better than the cola


Instant hit, really surprised how effective these are. Taste like cola bottle sweets.

Unai Balenciaga Gaztelurrutia

excellent for hydratation

Tracy O Reilly

Tastes like flat cola but gives you energy boost would buy again👍🏻


Great tablets for before or during races.




Give you a boost when needed

Oliver Jackson

Amazing. Great for use during intense exercise or just to keep you going through the day.

Brian Muir

Bought for the caffeine boost. Tasty enough

Mr Allinson

Taste fine and no problem with stomach

Mr. Robert Noble

Perfect for keeping well hydrated with a caffeine boost during fencing, golf, football or cycling.

Kevin --

Didn’t like the cola caffeine

Alessio Brancaccio

I'm a few intollerant to caffeine, but it's a very good product for improve energy and performance during sport activities.


Buon prodotto molto efficace

Terry Downing

They do what they say on the package and taste good too.