SIS Go Hydro - 20 Tablets
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SIS Go Hydro - 20 TabletsSIS Go Hydro - 20 TabletsSIS Go Hydro - 20 Tablets
Fast hydration, without energy.

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.



  • 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 Tablets



During moderate to intense exercise, we can produce up to 2 litres of sweat per hour depending on the environmental conditions. Sweat contains vital electrolytes, including sodium. Sodium is the most important electrolyte as it helps to stimulate thirst, improve taste and promote absorption and retention.

If fluid and electrolyte losses are not replaced, dehydration occurs which is a major cause of fatigue. Once dehydrated, our body temperature rises; our heart rate increases; we deplete carbohydrate stores quicker and we perceive the exercise to be more intense. SiS GO Hydro can help prevent this, with the aim not to lose more than 2% of our body mass.

Informed Sport Registered

SIS’ 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

Petenot a lot to say, taste nice and help me to stay hydrated when out riding
Mr ColeExcellent value. Great hydration. Like the caffeine boost.
JohnSWGood flavours
JTGreat for cramp prevention. Great price from Merlincycles, and expiry date was 2023. Very happy with purchase.
Mr FebriansyahOne of the best tabs out there! Definitely going for SiS from now on
MustaphaBeen using for 4 years and never had issues with stomach or taste. Grapefruit is my new fave!
Mr BrewerThe lemon and berry taste great. They help keep me hydrated, which is very important on rides.
Mr MThe best electrolyte tablets out there
Mr LazaroEasy to prepare and really restore my hydration!
Mr P.Taste good and does the job.
Phil CTaste great and less cramp! Recommended
Pak yinCola taste great
Mr Jose L TorresIt taste good, and it helps me stay hydrated, i have recommended them to my friends and let them see the variety of products they offer
NobbyReasonable taste and easy to drink
Mr GEssential for anyone who doesn't like bonking! Tastes good too.
Mr ChavezGreat tasting and great tabs.
Mr ChavezThese tablets are wonderful. The flavors are spot on.
Mr VerginisaKeeps you hydrated and most effective during long ride. Great taste also
RobertI've been using SIS Go Hydro tablets for a couple of years and they work great as a sugar-free electrolyte replacement.
MalNice taste. Very convenient
Mr BUsual SIS quality. Dissolves well
Mr MartinHelps keep you going and nice flavours
Miss BoothI was looking for something to replace electrolytes and these do the trick. They taste really nice.
Mr MartinFlavours are good
RobAlways very good, I have bought loads of these.
Mr RogersGreat stuff. Have used for years and are very satisfied.
Mr WallisLove these, Very easy to use, taste great and certainly more enjoyable than drinking plain water
klSIS Go Hydro tabs are by far the best tasting ones I've tried.
Mr MorrisThese are great for longer rides and tastier than plain water but also with something that aids to a more full recovery. For myself, now I do not have headaches later on - recovering after a 2 or 3 hour ride.
MackyEasy on the stomach
SamLet these stand for at least half an hour before you go out, and they're great. Go straight out and they have an unpleasant Disprin-like fizz. Assuming you give them time, they taste fine and help hydrate.
Mr ThorogoodAdds some spark to plain water, and for this price I can't fault them. Pretty weak in 800ml bottle, so might be best to use a smaller bottle or 1 1/2 tablets.
Mr SLemon is great!
Mr CanalongaGood flavor
Mr RussellTotal Value for money, you know what you are getting with SIS.
DorabNot tried these before. Berry flavour is OK, makes a change from plain water
Mr ScottNice cola flavour
martinAdds nice flavour to water without the sugar load.
SiobhanAlways reliable - nice taste and caffeine helps.
Mr LeightonMango, Mango and more Mango, my go-to flavour for on and off the bike hydration.
Mr ChavezGreat product and the taste was good.
HoxEssential for any cyclist that likes to push themselves, especially in the summer or on the indoor trainer where you can lose a lot of fluid.
PeterJust what I need in this warm weather to keep cramps at bay. Great price, usual prompt delivery. What more could one ask for?
Mr GibbonsMake luke warm water drinkable on longer rides and have salts etc to stop you going wonky!!
Mr BrutonHave been using these for a while now, no issues. They seem to work for me and have nice flavours. Merlin had them at a decent price with the added bonus of all flavours in stock unlike other online retailers.
Miss LeeBy far my preferred brand. Super simple to drop a tab into your bottle, tasty and fends off dehydration on the ride.
PeterBerry flavour is refreshing
Mr FilipskyPerfect for fueling workouts
Mr Phillipsdo what they're supposed to do - keep you hydrated and cramp-free
martinAdds nice flavour without suger/carbs.
Mr Al SharyaniThe tablets you need to carry on your long rides, handy and tasty
Mr NormoyleSIS= Top Quality Brand. Nothing more to say
JanIt's personal choice - my body tolerate SIS stuff well.
Mr BrightReally make a difference when used before and after
MarkSIS hydration tabs are my go-to when I know that I'm going to be working up a sweat.
Mr KayeThe berry tastes lovely!
SamGreat tablets, great taste. My go to drink whilst on the bike
SageThese tablets I have used for years and they are really good for keeping you hydrated while cycling! Or even running!
StashGot the lemon flavour, decent taste not overpowering which I think encourages you to keep drinking & stay hydrated, replaces essential electrolytes, what's not to like?
Mr RichardsonUsed these before, great tasting and keep me hydrated
peter19do the job - berry all the way for me.
AllanLove these. Berry and Lime are my fav. I’ve been using this for 3 years now.
HK PhooeyTaste fine, always mix with some fruit juice though.
Mr PARSONSThis is my first endeavor in to drinking supplements while riding. The flavor is not bad. The main benefet is of course the electrolyte replacement. Rides over 4 hours where i sweat a lot I found water just wasn't cutting it and i didn't want to eat any more than I needed to. This helped with that.
Mr MortimerNice mild cola flavour. Enjoy the caffeine hit.
HerbertTastes great, hydrates well!
Mr BustilloFeels more hydrated on longer rides
DavidGreat for those longer days in the saddle.
Mr HammoudI would highly recommend it for every exercise, especially for long rides and warm weather.
Mr PoulinVery good quality and taste and very good price for 20 tablets
Mr GwilliamWon't leave home with them in my bottle
alanNice flavour electrolyte tablets
MoumtzisYou feel the difference from other cheaper products
Mr PunzalanThis is good for before/during/after race/training.. I use this also for recovery
Jamesfirst international order and it was perfect!!
Mr Faustergood price good energy
Mr McCallumYou can not miss with these hydration tablets.They are great for hydration and taste good too.
Mr RomeroTastes great!
Courage the dogI really like the clean these tabs...
Mr WilliamsEnergizing, tastes good, easy to pack extras for longer rides.
Mr SandersonUsed these in conjunction with Salt stick tablets, no cramp , top result!
Mr MortimerLike the cola taste and caffeine works. Good value comparably.
Mr KOLOMIICHENKOSuper tablets for hard training
AndyBerry flavour the best of the bunch. Recommended.
StevenTaste good. Seem to help me with cramp.
Mr TEOGreat energy booster on the go
SevenWSIS quality guaranteed, trusted brand for all nutritional sports products. Flavours are very palatable, fizz is just right doesn't make your full bottle become a fountain when you open it.
Mr PykePleasant taste. I use saltstick capsules for electrolyte replacement and these tablets to make plain water more palatable.
Mr RyanMy wife uses these on longer running events and finds they give her a little bit of something else rather than just water. I use them when I've had a tummy bug, and need a little pick me up before going back on to food!
oscarI bought those from Merlin Cycles for half the RRP. Quick delivery & Good service from MC. As for the product itself, I find it to help recovery and train harder (it is that or a decent placebo effect). Went for the Lemon taste, which is subtle. One pill in 500 ml bottle produces a nice drink, not too salty (does not make more thirsty), does not leave aftertaste .
Mr MachellEasy to use, great taste, can carry extra tablet(s) on the go, as they are the size of a pound coin
ColinUsed for years. Makes the water more palatable but not sickly.
DaveThese are nice, dissolve easily, good flavour so encourage you to keep hydrated.
DavidTastes good and is easy to dissolve in water. I tend to just use it at work when I start getting tired and a bit dehydrated in the afternoon and then I don't have to cycle home with a headache.
Mr ConnollyI ordered some more SIS Go Hydro tablets on the back of having bought the Berry flavour. Bit disappointed by the Blackcurrant which was quite weak, the Cola was better but the Berry would still be my favourite. Recommended.
Mr MartignagoGot these at a bargain, taste is great and they are sugar free!
KonstantinosThey are my favorite tablets in the market. Their flavor are great. The taste of lemon is not too sweet.
JonathanThey seem to work - flavours are a personal choice!
Chris B-CThe weather has still been quite cold since I've been using these so I've not been that dehydrated but these tablets do seem good. They dissolve instantly. I find the lemon flavour is pleasant with no aftertaste. The flavour is not very strong when I use 1 tablet in a 750 ml bottle.
RajHigh quality tablets that does the business on longer, demanding rides to keep you going strong.
Mr ElibolFlavour is good (cola)
Miss MichaelsThese are my favourite hydration tablets. Great taste and no nasty aftertaste
Mr PittI find SIS products palatable and effective. These tabs are economical and not too strong flavour at recommended dosage.
markLove the product always make sure I have a tube in the house for those long distance rides
Paulo JorgeGreat hydratation for a smaller price. Recommend for sure
StephenTastes good, and helps to keep you hydrated!
Mr RomãoMy favorite tablets in the market. Taste of lemon without being too sweet.
MontePerfect for keeping hydration levels up and reducing cramp risk.
Shantelle GHI brought the berry flavour. It tasted great, not too sweet and sickly like some of the other brands.
RichardThe Mango flavour tastes good!
Mr MitchellQuite nice tabs and would purchase again.
Mr SLemon version tastes fine and does the job. No complaints. I find with all brands of hydration tab that the basic citrus flavours are more palatable.
MattWhile these offer the rehydration required on longer rides, the overall taste isnt the greatest. Quick and easy to use.
RossPerfect for helping prevent leg cramps on longer rides - add to your hydration pack or take a few tablets with you if you're going all day and need to refill. The flavour encourages you to stay hydrated and doesn't remain in your reservoir if you use plain water after. A must for longer rides/ hotter days/ wrong clothes choice ridng!
Karl RGreat flavours, mix well into water. Seem to help on longer rides.
Mr ChanEasy to prepare and tastes great. Has not let me down on tough rides.
Mrs BarkerTasty little juice drink love all these flavours
BlytheNice contrasting taste & helps rapid re-hydration!
Mrs MillarTaste good, excellent value too.
Mr GteeLove the SIS Go Hydro tabs have switched full time from sugary based types and loving the berry flavour in particular.
Mr DohI have all flavor of cola, lemon, berry. After having those tablets on my water bottle, didn't get any cramp on legs. Recommend.
Mr HoLike the berry smell,. 2 tablets just nice for 750ml water. The lemon give a fresh feeling after some distance. Will definitely restock.
Mr GuardieiroGood quality and good flavour. I will buy more now!
Mr RichardsPleasant taste and easy to drink, not too sweet.
Mr Shenton-TanI like the citrus flavour. Handy tabs to help avoid loss of salts and prevent cramps.
WrightVery tasty and helps me stay hydrated
beardI take these out running with me, dissolved in water and really keeps you re-hydrated especially on these warm sticky days.
Mr morganThese I would highly recommend for those long rides giving more energy than just flavoured water.
ReidEasy on the stomach and dissolve well.
OldsNot too sweet and keep me fueled.
Charlie S.Great value. Good taste. Would buy again
LaceyNice taste and good value in a 20 tablet tube
Mr ParsonsI find these great to ensure I stay correctly hydrated. I find them easy on my stomach and tasty.
GeersyWhether it's in the mind or real, these tablets help my recovery time from exercising.
Mr aspdenAlways use these in Dubai. Essential in summer, and also for hangovers!
RimmingtonThese keep me going when on a ride. Replace minerals lost through a hot day. Fast delivery.
Mr BroomGreat flavours, quick to dissolve...mix well with energy powder as well..
SomeGreyBlokeVery good, I bought lemon flavour, as when you have all the sweet gels and energy bars, it feels good to have something bitter.
BarryRefreshing, good taste and seem to do the job
Mr GiffordAmazing. Cheaper than competitors, just about as nice, and brilliant hydration, cramp relief. I've started using them at work now for generally staying awake - works a treat. One suggestion would be to dilute them a bit more than 1 tab to 500ml - seems to work just as well and slightly nicer to drink I've found
Graham ClarkGood for after your ride. No calories so it doesn't put back all the fat you've just burned off. For me, the flavours are better than other similar products.
Mr RobertsUsually use different product with a 5 in the title but find this equally as good and the berry flavour is really nice
Mr MawsonWorks better that water alone. I don't have that "thirst" a few hours after now due to sodium loss through sweat.
Mr SherlockAwesomeness in a tube
Mr FranceMuch more convenient than measuring out powdered energy drinks!
Mr QuelchThese taste so much better than the Electrolyte drink...much easier to consume during races. Highly recommended.
DaveGreat Product, Very tasty and seem to hit the spot.
Mr smitheevery similar to the zeros have had no cramps during races would recommend.