Reviews over the
SiS Go Isotonic Energy Gel

SiS Go Isotonic Energy Gel
4.5 / 5
Average from 144 reviews
5
90 reviews
4
22 reviews
3
4 reviews
2
3 reviews
1
4 reviews

5 / 5

Great

- Bart, 13 September, 2025

Works well for marathon or long bike ride

Pros & Cons

Easy to open
Good price
Work well
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5 / 5

Flying up hills with a gel

- Wil, 6 September, 2025

Started using it on advice and indeed you notice the difference. A gel every hour and dynamite in the legs.

Pros & Cons

Flavour
Operation
Packaging
No
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5 / 5

Excellent SIS gels

- Stephane, 16 August, 2025

1 gel of 20g of carbohydrate per 1/2h I make long exits 150/200 kms without any concern with these gels.

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5 / 5

Flavor is not bad, easy to open

- Jacopo, 13 July, 2025

Easy to tear with your teeth

Pros & Cons

Easy to open

5 / 5

Handy while cycling and is never on the stomach.

- Nico, 24 June, 2025

I have been using these for years and compared to other brands, I can tolerate these best.

Pros & Cons

Does not weigh down the stomach
Easy to open while cycling
Handy when climbing
Could contain more carbohydrates
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5 / 5

Very good value for money

- Jurre, 17 June, 2025

Works well and fast perfect gel for me

Pros & Cons

Easy to open
Tasty
Works well
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5 / 5

Doing what they need to do

- Peter, 16 June, 2025

SIS gels really helped me to complete the 11-city tour again. Tastes good, works fast and easy to open

Pros & Cons

deliciously fresh taste
easily digestible
easy to open
give quick energy
no
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5 / 5

Top for athletes

- Guy, 28 May, 2025

Good to use and easy to open

Pros & Cons

Always a good product
Immediate delivery
Long shelf life
Used up too quickly
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5 / 5

always use this one, don't want any other

- Sander, 15 May, 2025

as expected!

Pros & Cons

bites down well
delicious taste
packaging easy to open on the go
would have liked a variation box
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5 / 5

Easily edible, but waste from packaging awkward.

- Philip, 3 May, 2025

This is a fine gel also for running. Easy to handle during a run or bike ride. The packaging does tear in two which makes packaging waste a bit awkward at times. Also don't know how this can necessarily be improved. When exercising intensively, it also sometimes gives me sticky hands.

Pros & Cons

Easy to eat and swallow
Fructose free
Moisture-to-food ratio
Closure comes off the packaging
Sometimes a bit sticky hands
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5 / 5

SiS Gels are my go to

- Dave, 30 April, 2025

Super easy to open on the bike and the top/lid stays attached to the rest of the packaging so no rubbish in the bushes. 1 piece to go back into your jersey pocket

Pros & Cons

Easy on the stomach
Not too sweet

5 / 5

With SiS, I dare to go out just fine!

- Mark, 12 February, 2025

With gels you can go ugly wrong during a long endurance run, but with SiS I dare to go out just fine! It is an easy gel that swallows well. It also fits perfectly in the side pockets of my Fusion tights. This is a keeper!

Pros & Cons

good price
good taste
no water needed
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5 / 5

Good quality and good price

- MK, 11 January, 2025

Good quality and good price

Pros & Cons

Good price
Good quality
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4 / 5

Excellent gels

- Karel, 20 November, 2024

Matches expectation , have been using it for n few years .

Pros & Cons

easy to digest
no stomach upset
Taste
lemon lime taste is slightly off
opening remains difficult
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4 / 5

Perfectly effective

- Erik, 17 September, 2024

I like this flavour (orange) best. Is not too strong and therefore no aftertaste. Do find the packaging difficult to open. Not very easy while driving.

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5 / 5

Efficient, easy to open, great taste

- Didier, 9 August, 2024

I've been using her SIS gels for a long time and I'm very happy with them.

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5 / 5

Gel sis au top

- Astoul, 29 July, 2024

Certainly one of the best gels on the market

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2 / 5

Not convinced

- Sonia, 28 July, 2024

I wanted to try out this brand, especially the Beta Fuel gel, which was not available when I ordered it. This gel is difficult to open even with your teeth! I didn't notice any significant effect, but the Lemon & Lime flavour is perfect!

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5 / 5

Tasty and affordable!

- John, 21 June, 2024

Great energy on my bike rides!

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3 / 5

Good effect but foul apple taste

- Tibo, 4 June, 2024

Apple does not taste natural and when lukewarm due to body temperature even more unpalatable. But it works well and drinks easily. On its own, no water needed but to wash away the taste. I have no experience with the other flavours yet.

Pros & Cons

Drinks easily
Works well
Apple is not tasty and not a natural flavour
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1 / 5

prefer liquid without chunks

- Kurt, 29 May, 2024

Not so tasty in texture

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5 / 5

Efficient energy gel

- Philippe, 27 May, 2024

The gels are large enough to provide a good dose of carbohydrates during exercise.

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5 / 5

Top service

- Alex, 21 May, 2024

Customer for years and still very satisfied

Pros & Cons

Correctly packaged
Fast delivery
Good price-quality ratio
Out of stock for a while
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4 / 5

Good product

- Hannes, 17 May, 2024

Easy to pocket and use.

Pros & Cons

Easy to open
Reasonably well-filled
Taste- texture could be better
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4 / 5

Effective and competitive price.

- Alexander, 16 May, 2024

For me, the effect of SIS's gels is remarkably greater than that of 'cheaper' brands, which ultimately turn out to be no cheaper. Sharp price and very effective! Tastes relatively good too, though that's personal.

Pros & Cons

Effective
No water needed
Price-quality
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3 / 5

Good gel for strenuous exercise

- Jochen, 14 May, 2024

Good fat digestible energy gel... Packaging could be better

Pros & Cons

Easily digestible
Easy to drink during heavy exertion
Plastic top does not hang after tearing open
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2 / 5

Not super

- Sam, 13 May, 2024

Not really tasty. Weird texture. Tastes like kind v applesauce

Pros & Cons

Exactly applesauce. Not really tasty
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5 / 5

Just right

- RJJ, 13 May, 2024

Leaky gels. Just right.

Pros & Cons

Easy to open.
Good concealment.
Price/quality
No
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4 / 5

fine gel , food tastes good

- KP, 13 May, 2024

Likes it well no, trouble with my stomach or anything, have ordered this produckt several times already

Pros & Cons

Taste
works well
sometimes slightly more difficult to open
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5 / 5

Easily digested gel

- Bernard, 9 April, 2024

Easily digested gel

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4 / 5

Not ant-sweet and therefore top

- Philip, 10 March, 2024

As far as I am concerned, one of the finest gels. Once the pack is open, the gel is easy to swallow without the need for water.

Pros & Cons

Easy to swallow without water
Fine taste
Often difficult to open
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5 / 5

A real energy boost during your run !

- Anne, 6 March, 2024

SiS Go Isotonic Energy Gel provides optimal replenishment of simple & multiple carbohydrates. Ideal for use during training or competition!

Pros & Cons

Delicious & different flavours!
Easily digestible (= light on the stomach)
Easy to open while walking :')
No water needed
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5 / 5

Essential product for longer bike rides

- Roel, 6 March, 2024

Fine gels with a nice flavour. Packing is easy to open with your teeth while cycling. Squeezing the gel is also easy

Pros & Cons

Easy to tear
Fine size
High in carbohydrates
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5 / 5

Best gels on the market price/quality

- Dion, 5 March, 2024

Been using the gels for several years the taste is good, and it does what it is supposed to do

Pros & Cons

Effective
Price/quality is good
Tasty
Few flavours
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5 / 5

Top product

- Heleen, 29 February, 2024

Used for long endurance runs

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5 / 5

Product meets expectations

- Trudy, 24 February, 2024

Great taste and thickness, my marathon workouts go super with it.

Pros & Cons

Not so sweet
Thickness is fine
Pouch sometimes tears open with a bit of difficulty
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4 / 5

Good energy gel

- Magnus, 23 February, 2024

An energy gel that goes into the body quite quickly and out quite quickly. Excellent for Zwift sessions.

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5 / 5

Nothing to complain about on any level

- Gautier, 21 February, 2024

Super product

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4 / 5

Excellent sports nutrition

- Jan, 20 February, 2024

Easy to use nutrition for my long endurance runs

Pros & Cons

Price
Quantity
Taste
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5 / 5

Price-quality definitely ok!

- Xavier, 19 February, 2024

Very satisfied!

Pros & Cons

Easy to use
Not too sweet, does not stick
Very tasty
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5 / 5

Super price

- Ulrich, 19 February, 2024

If you can wait a few days, this is the place to be

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5 / 5

Fine sports gel

- Niels, 17 February, 2024

Fine sports gel for longer distances. As the contents are pleasantly liquid, easy to swallow while running

Pros & Cons

Good flavour
Not too sweet
Pleasant to get away with while walking
Lip comes off completely on opening
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5 / 5

Lots of benefits if you are serious about running and preparing for long races.

- Boris, 11 February, 2024

Top: Bulk buying is a godsend, super handy if you're training for a marathon. You need a lot of them, so having such a big supply is top and saves on costs. Tastes great, you have to work it in while running anyway, so nice that it tastes good. Easy to take while running, even when you're at pace you can take this gel without fuss. No water needed, so it runs nicely. Less: Tricky to open with cold fingers: When it's cold outside, a pack like this is sometimes a struggle to get open. The texture might be a thing: The thickness or stickiness for people might be a minus point. It leaves white streaks. Taking mess with it, after taking it you're stuck with that empty pouch. Not ideal during a long run.

Pros & Cons

Buying in bulk is a godsend
Easy to take while running
Tastes great
Carry mess
Difficult to open with cold fingers
The texture might be a thingy
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1 / 5

Not intended for me

- Richard, 10 February, 2024

I had to go to the toilet right away. my stomach can't stand SiS. Now order Maerten. Is a lot more expensive but I can keep it down.

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5 / 5

The gels are superbly balanced and pleasant to take!

- Lilou, 7 February, 2024

compliant item, easy to use and good taste

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5 / 5

Takes up little space and gives lots of energy!

- Paul, 23 January, 2024

Super handy on the go during a long bike ride.

Pros & Cons

at a keen price
excellent quality
wide range
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5 / 5

Very satisfied!

- Arjen, 19 January, 2024

I managed to open and consume the gels while running, so very satisfied!

Pros & Cons

Nice taste
No stomach discomfort
Opens easily
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3 / 5

Good product, shelf life too short

- Johnny, 18 January, 2024

Very fine gels for training marathon, only bought large pack immediately before marathon itself, but shelf life is too short, this could have been mentioned

Pros & Cons

Good price for a good product
Short shelf life of gels
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5 / 5

Easy and energy-packed

- Marnix, 16 January, 2024

As a triathlete, I use these gels during my races. They are easy to carry, tear open and squeeze empty while cycling and running. They give enough energy to last for a while

Pros & Cons

Easy to tear open during competition
Provides enough energy for every 20 min of intensive sp
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5 / 5

Top for athletes!!!

- Judith, 7 January, 2024

Been using it for years: "have a break" extra boost!!!

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5 / 5

Top product

- Jan, 7 January, 2024

Ideal, see pluses, goes in like a sweet. Necessary energy is delivered quickly.

Pros & Cons

Not too sweet or sticky
Taken without drinking
Tasty taste
Opening while cycling could be easier
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4 / 5

Great product for training and racing

- Rianne, 27 December, 2023

Good product, easy to use, helped me well in my racing and training

Pros & Cons

Can be taken without water
Easy to use
Great taste
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1 / 5

Chunky porridge in a bag, for when you want to go over your neck on a ride.

- Mick, 6 December, 2023

SiS has all kinds of tasty and good products, but not these. I thought they were expired, but a quick search on the internet and no: these gels have 'texture'. I can't get them in. I read that you could give them a good shake to get rid of it, but it doesn't work for me.

Pros & Cons

Contains chunks
Non-smooth
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5 / 5

Definitely an option for repeat business

- Frans, 5 December, 2023

Excellent and has been using it for a long time

Pros & Cons

Fast delivery
Faster website processing
Packaging top
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5 / 5

Good stuff!!!

- Linda, 2 December, 2023

Perfect during endurance runs and bike rides!

Pros & Cons

Easy to use
Good flavour
Nutritious
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4 / 5

works well with effort

- JOS, 17 November, 2023

easy to use

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5 / 5

Great stuff

- Jeftha, 10 November, 2023

Packaging works easily , gives just that extra boost

Pros & Cons

Does what it needs to do
Fresh
Tasty
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4 / 5

Great product

- Richard, 9 November, 2023

The pack is difficult to open, but gives enough energy and has a fine taste

Pros & Cons

Flavour
Quantity
Ease of opening packaging
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5 / 5

Good product and value for money

- Giovanni, 29 October, 2023

Easy to carry gel for long endurance sports training and water is not needed

Pros & Cons

Bringing water is no longer necessary
Taste is sweet but good
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5 / 5

Top stuff

- Hidde, 20 October, 2023

Great for during races

Pros & Cons

Good stuff
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4 / 5

Fine product

- Mario, 16 October, 2023

Tricky to open otherwise okay

Pros & Cons

Not too sweet
Tasty
Stays hard to open
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5 / 5

Good, tasty gel that gives you a good boost

- Peter, 19 September, 2023

Tasty gel with delicious flavours. Convenient packaging that is easy to open while cycling. Just right

Pros & Cons

Convenient size
Just enough for a boost
Tasty flavours
No
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4 / 5

wetenschappelijk verantwoorde vloeibare energie-gels met een correcte smaak

- Fabrizio, 15 September, 2023

persoonlijk geven deze gelletjes mij het beste effect en geen gastro-klachten.

Pros & Cons

geen extra water nodig
goed verteerbaar
lekkere smaken en niet te "suikerig"
afscheurtipje kan makkelijker
zou goedkoper moeten zijn

5 / 5

SiS Go Energy gels is a formidable product.

- Viktor, 11 September, 2023

SiS Go isotonic energy gel is/are very fine gels to use when cycling, among other things. The quality is unbeatable as far as I am concerned.

Pros & Cons

good pack size
performance-enhancing
pleasant taste
useful and beneficial at high intensity
less useful at lower intensity
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5 / 5

SiS Go Energy gels is a formidable product.

- Viktor, 11 September, 2023

SiS Go isotonic energy gel is/are very fine gels to use when cycling, among other things. The quality is unbeatable as far as I am concerned.

Pros & Cons

Good pack size
Performance-enhancing
Pleasant taste
Usable and beneficial at high intensity
Less useful at lower intensity
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5 / 5

Top gel.Gives you an extra boost.Highly recommended

- Max, 3 September, 2023

I have bought sis gels from Mantel several times. Always delivered on time. Very long shelf life.

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5 / 5

Best gels

- Oscar, 2 September, 2023

Once again, like all SIS products, it contains all the nutrients a cyclist needs.

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5 / 5

Tasty and easily digestible

- Merel, 30 August, 2023

I have now tried all the flavours and find them quite palatable. They work fast and my tummy can handle them well too. Tropical and blackcurrant are my favourites.

Pros & Cons

Easily digestible
Gives quick energy
Quite tasty
Difficult to open while running
Does not contain excessive carbohydrates
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5 / 5

All ok

- Kurt, 27 August, 2023

Fully meets my expectations

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5 / 5

Top product at a competitive price

- Hen, 9 August, 2023

I have been using SIS for a long time and it is simply an excellent product. It does exactly what it should do: deliver energy quickly.

Pros & Cons

Convenient packaging
Delicious taste
Fast-acting
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5 / 5

Recommend

- Piotr, 27 July, 2023

Excellent product, good taste, digests well!

4 / 5

Tasty and nutritious

- John, 23 July, 2023

Excellent gel

Pros & Cons

Great to get away on the road
Packaging difficult to open under cycling
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5 / 5

Tasty and fast

- Joost, 23 June, 2023

Nice

Pros & Cons

Quick
Tasty
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5 / 5

Perfect, it's quick to swallow and tastes great.

- Samuel, 20 June, 2023

The difficulty of absorbing other brands led me to try this SIS product, which is really top-notch. Excellent gel, easy to swallow (even during high-intensity races). It's quite liquid and tastes great in the mouth.

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5 / 5

Highly recommended

- Branislav, 19 June, 2023

As good as it gets

Pros & Cons

Easy on stomach
Small size, great for back pocket
Tastes nice
No bigger variety packs
Price is climbing up....
Sometimes hard to open it

5 / 5

good gel - taste ok

- Jan, 17 June, 2023

tab should be able to stick to packet

Pros & Cons

no provision for holding tab to package
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4 / 5

Top product!

- Maarten, 13 June, 2023

Handy to carry came in handy on a brisk bike ride

Pros & Cons

Convenient packaging
Tastes good
Works fast
Tearing off top somewhat difficult
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4 / 5

Good product to be tested according to personal tastes and needs

- Il Mala, 7 June, 2023

Used in conjunction with canteens with matodestrine and bars, useful before long climbs and in the second of 5/6 hour rides to make up for energy dips, it is consumed and assimilated well without the need to drink large amounts of water, any residue on the bike is difficult to remove due to the high sugar component.

Pros & Cons

a lot of product in a small footprint
Does not require too much additional water
Effective
residue on bike not easy to remove
very dense
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5 / 5

Super bon

- Philippe, 1 June, 2023

Super

Pros & Cons

Bon
Efficace

5 / 5

Do, especially if you often go out for more than an hour.

- Clint, 12 May, 2023

I always take extra gels than I think I need. Then, should I be surprised by hunger/faintness, I always have some left over. Gels are great for this. I had also tried gels from Kruidvat before this, but the quality of those just doesn't make it: you get rid of these more easily, they don't taste like the enamel is burning off your teeth, and I get the idea that I digest them faster/convert into energy faster, too.

Pros & Cons

Quick energy
Quite tasty after a while
Tastes a bit like suds at first
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5 / 5

This SiS gel will get you there!

- HD, 24 April, 2023

I always have these SiS gels with me during (long) tours and cyclosportives; they are tasty (not too sweet), give lots of energy and are easy to carry.

Pros & Cons

Lots of energy
Multiple flavors
Tastes good
Packaging = waste (unfortunately)
Sometimes difficult to open
Sticky
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5 / 5

Excellent taste

- Maarten, 18 April, 2023

Good quantity. Taste less gross than other tastes

Pros & Cons

Best taste of this type
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5 / 5

Recommended

- Tom, 28 February, 2023

Easy to get rid of without water and not too sweet.

Pros & Cons

Easy to eat
Good source of energy
Not too sweet
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5 / 5

good stuff!

- Stephane, 1 February, 2023

Most of the ones I use are on the stomach ( use 2/3 per hour ) and I can easily take these for 2 hours at a time without getting it on my stomach.

Pros & Cons

Are not on the stomach ( jogging)
Not much taste
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5 / 5

I bought some for my grandson who is a racer in the 1st year espoir category.

- Daniel, 29 January, 2023

80 years old, 2 bike rides a week with the club. 1 gel per hour of practice

Pros & Cons

But also for amateur cyclists of ALL AGES
For top-level athletes
Super product
No weak points, even the price is right on the money
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5 / 5

SIS and Mantel, the best as usual!

- Adrien, 27 January, 2023

Great products, as always with SIS. The gels are free-flowing, very tasty and easy to assimilate, just great! Free, ultra-fast delivery with Mantel.

Pros & Cons

Prices
Smoothness
Taste
no
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5 / 5

Excellent , I recommend it

- Annalisa, 23 January, 2023

Excellent energy gel

Pros & Cons

Digestible
Energy
None
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5 / 5

Very effective and tasteful

- Martijn, 18 January, 2023

I also use these gels with running during endurance runs. Is still preferred by me over eating bars because it has a quick effect and you get fluids at the same time.

Pros & Cons

Drinks away easily
Easy to open
Tasteful
No
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4 / 5

Been riding this stuff for years, very satisfied with it

- David, 18 January, 2023

Been riding this stuff for years, very satisfied with it

Pros & Cons

easy to take
gives a lot of energy
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5 / 5

Top product

- Alexander, 11 January, 2023

After long rites no I put a few on

Pros & Cons

Easy to carry
Nice taste
Take without water
No
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5 / 5

Good taste, fine substance

- RvdB, 27 December, 2022

Good taste. Not too sweet. Pleasant substance. Sufficient energy in a gel.

Pros & Cons

Energy
Gel(egg)
Taste
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5 / 5

Great product and appropriate price

- Massimo, 16 November, 2022

Practical and very digestible, excellent energy supply, I personally use one every 30/40 km.

Pros & Cons

Digestible
Flavor
Price
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4 / 5

Easy to swallow

- Alejandro, 27 September, 2022

I was pleasantly surprised by how easy it was to empty and swallow. A light sweetness that does not cloy. Phenomenal price. For me it rivals Maurten

Pros & Cons

Easily swallowed
It is maltodextrin
It is not cloying
A little difficult to open with wet hands
Big size
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5 / 5

Really perfect

- Frederic, 22 September, 2022

The composition is excellent and, above all, the product doesn't have an overly sweet taste that disgusts. It also remains fairly liquid compared with other gels, which I digest much better than the brand I used before.

Pros & Cons

easy to digest
not too sweet
quality/price
not enough different tastes
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5 / 5

I'm going to order another box ;)

- Cailean, 22 September, 2022

After using quite a few gels, I think this one is one of the better ones. Often it becomes a sticky mess when you use one while cycling, but not at all with this one. Easy to take during exercise.....

Pros & Cons

Easy to use
No sticky mess
Taste
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5 / 5

the best texture

- Diego, 21 September, 2022

The best gels I have ever tried. More liquid, less sticky and fresher.

Pros & Cons

price
taste
texture
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4 / 5

Good for traveling

- Jordy, 17 August, 2022

On my first bike ride, I definitely needed gell and it helped me complete my first 75km ride

Pros & Cons

Very good pick-me-up while cycling
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5 / 5

Excellent gel

- Walter, 12 July, 2022

My first introduction to sports gel. Great taste, good value for money. I will order more

Pros & Cons

Easy to open
Flavour
Price/quality
Takes some getting used to
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5 / 5

Not only RedBull gives you wings!

- Jeffry, 11 July, 2022

Efficient use, glides in smoothly.

Pros & Cons

Easy to use
Flown up Mont Ventoux using these gels
Good price/quality ratio
Only gel that does not cause stomach complaints
There are no more efficient ones
Could have been a bit more zesty
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5 / 5

Booster for more energy

- Alex Giraldo, 7 July, 2022

I usually use before and during training with good results.

Pros & Cons

Great taste
Quick absorption
Small packaging
No
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