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Isotonic drink Ndure 900g | Prototype -40% | Cyclists welcome

by Nduranz
Save 40%
Current price €14,99
Original price €24,99



Ndure is the world's first energy-hydration drink with a ratio of 1:0.8 (maltodextrin and fructose) which at the same time contains electrolytes in concentrations found in human sweat. The 1:0.8 ratio between maltodextrin and fructose is not revolutionary but rather a result of plethora of research largely conducted by Kiwi professor David S. Rowlands. He discovered that this ratio does not only enable the highest possible oxidation rates of ingested carbohydrates, but also positively affects performance and even gut comfort.

The Ndure isotonic drink is produced in the UK at a facility that is a pioneer in the development of isotonics and energy gels - all semi-finished products are also tried and tested by employees who come from the ranks of triathletes and cyclists. Gentle and fresh flavours, natural aromas and the absence of sweet aftertaste is a combination of knowledge, personal experience and, above all, many subjective evaluations. It is made from exclusively British ingredients of the highest quality. Electrolytes come in the most available forms and in a ratio identical to that of human sweat. It is currently available as a prototype in a 900-gram package, as Nduranz wants additional feedback on flavours - it turns out that there is a link between flavour and subjective perception of exhaustion, with the company offering the product at a uniform 40% discount in order to develop the most palatable flavours without artificial additives.


  • 2nd generation Ndure, the answer to the three main problems of pro cyclists
  • Electrolytes in a ratio identical to that of human sweat
  • First in the world with a ratio of 1:0.8 (maltodextrin and fructose)
  • The multi-component mixture allows the absorption and oxidation of 90-120g OH/h
  • 120g of saved glycogen in 4h (as opposed to glucose drinks)
  • The most effective strategy for preventing muscle cramps
  • It prolongs performance time and reduces fatigue 
  • Free of harmful additives, aromas, colours and artificial sweeteners
  • Citric acid-free and pH-neutral
  • Also suitable for young people and vegans
  • Electrolytes in citrate form with added salt
  • The best isotonic drink for cyclists and triathletes
  • Prototype version - 40% discount - we collect information about flavours



Dosing is easy: 1 energy unit per hour = 2 scoops (basic or short workouts up to 2h) in 500ml of water. 2 energy units per hour = 2 scoops, one for each of the 2 separate 500ml bottles (workouts over 2 hours or less, extremely intense workouts and races).

In hot conditions, the bottle should contain 750ml of water.



Maltodextrin, fructose, electrolytes (sodium chloride, potassium citrate, calcium citrate, magnesium citrate), natural aroma. No known allergens.

More info


Customer reviews


"The second generation of the Ndure isotonic drink for cyclists, swimmers, triathletes, track and field, enduro, not forgetting football is a novelty on a global scale, as it has achieved a fusion of four key requirements through a combination of the kinesiological expertise and testing in sport. Fresh flavours without the presence of artificial sweeteners or dyes, absorption of 90-120g OH per hour, no digestive problems, and pure isotonicity - electrolytes in ratios identical to human sweat. Made in England from exclusively British ingredient".



For cyclists, triathletes, swimmers, football players, mountain runners, MTB and motocross riders, Nordic skiers, hockey players, and all endurance athletes, an isotonic drink is by far the most important supplement - it is the most effective nutrient that is converted into energy, replenishes our glycogen reserves and reduces stress hormones. The age of the athlete is not a condition for using a quality isotonic drink - our youngest are often even more burdened than us. Unfortunately, most isotonic drinks are based on artificial flavours and artificial sweeteners, which paints in a bad light the use of sports drinks, which are also recommended by reputable sports doctors for long-duration workouts.

the best isotonic drink for cyclists

The aspect of sports performance is another dimension of isotonic use - isotonic drinks for cyclists are especially important (fuelling). Glycogen does not take care of our energy levels from start to finish - by burning it, which is often done at a rate of even more than 3g/minute, our physical performance also decreases. Energy sensors in the body very quickly detect a decrease in glycogen and limit our physical ability. The only thing we can do is to refuel on a regular basis, while also limiting the negative effects of the stress hormone cortisol. In order to prevent physical injury or disease, cortisol adapts all body subsystems to acute danger (increases pressure and pulse, narrows blood vessels, reduces long-term oxygen supply, and temporarily limits the communication of the immune system).


In short: All we lose and nothing more!

Ndure takes into account three factors:

  • the ingredients and nutrient ratios must be adapted to the body’s transporters that take in substances from the stomach;
  • the electrolytes must be in a ratio that allows them to enter the cell;
  • it must contain nothing more than the things the body needs or loses.

This is especially true for some electrolytes - magnesium destroys the tonicity of the isotonic and disrupts the passage of substances of important electrolytes, such as sodium and to some extent potassium. 

The first mistake corrected by Ndure was the ingredients. Many isotonic drinks for cyclists target only one transporter, the glucose transporter, leaving the unabsorbed nutrient in the gastrointestinal tract and causing digestive problems. Ndure contains an appropriate ratio of maltodextrin (considered the most gentle to the stomach) and fructose. A ratio of 1:0.8 is ideal, as it allows us to absorb between 90-120g OH/h, which is 50-100% more than with your ordinary beverage.
 isotonic drink for cyclists gut discomfort
The Ndure isotonic drink takes into account both key receptors, both glucose and additional fructose (GLUT5), and therefore allows us to ingest up to 120g OH/h during training instead of the usual 60g, which was the amount anecdotally applied to the upper limit (in practice, this number is closer to 40-50g)



The quality of the ingredients and the absence of artificial flavours, sweeteners, citric acid, dyes - this is a constant in isotonic drinks for cyclists - is something else that contributes to both health and well-being. During exertion, the mucous membrane of our gastrointestinal tract is sensitive and, as a result, a high amount of magnesium, which we will not absorb under any circumstances, can cause discomfort, causing us to either give up or lose our focus. On the other hand, a strong flavour enhancer, which we normally enjoy in our free time, can trigger digestive problems. To conclude: not every maltodextrin is the same, not every fructose is the same - the method of processing and the final degree of deviation from the sample model is what comes to the fore in the conditions of maximum exertion. Inadequate forms of electrolytes (carbonates) cause them to be excreted, while some forms of magnesium have laxative effects.


One of the most interesting misconceptions in sports physiology is the myth of electrolytes. It is widely believed that electrolytes either prevent cramps or that cramps are caused by magnesium lost during exercise. The fact of the matter is, however, that the cell is extremely well adapted to homeostatic processes and if the isotonic drink truly is isotonic, there will be no lack of magnesium, as we are virtually NOT losing it (a thousand times less than sodium). Adding magnesium, which is otherwise an extremely healthy mineral and can also help the athlete (if taken separately from an isotonic drink, say in the evening), only destroys the tonicity of dissolved electrolytes and increases the possibility of digestive problems (diarrhoea). Additional magnesium to prevent muscle cramps is recommended only to pregnant women, while to achieve good results we recommend you avoid large intakes of magnesium before the competition.

isotonic drink for cyclists muscle cramps

Muscle cramps occur due to a lack of glucose in the blood - if we burn glycogen, blood glucose decreases as well, which leads to disorders of the nervous system (we cannot think clearly) and of neuro-motor receptors. Acetylcholine is also one of the major nerve transmitters (this is our main memory neurotransmitter), but it is also responsible for signaling muscle contraction. Whether it is a malfunction of one or a whole host of neurotransmitters is still a matter of scientific debate. 


Electrolytes play a key role in the body - without them, life ends in an instant. Potassium injection is well known, less known is the alleged story of the Greek runner Philippides, who ran from Marathon to Athens - a distance of 42km - to announce victory over the Persians. After that, he supposedly died on the spot - probably due to an electrolyte imbalance. Electrolytes are crucial for the normal functioning of all body subsystems as well as the cells themselves - by just drinking water during prolonged exertion we increase cell volume, while on the other hand, insufficient fluid intake reduces the amount of blood plasma itself. But to achieve a better result, we can forget about electrolytes and rather strive to oxidise that magic number of 90g/OH per hour. 

isotonic drink for cyclists electrolytes
With the energy-hydration drink Ndure we get the "competition dosage" (the 90g of CHO mentioned above) through a gram of electrolytes per hour, taking into consideration the principle of isotonicity (under the condition we stick to the instructions). Different types of tonicity derive from the relatively maverick nature of cells, which is why the saline solution we might have received at the hospital or after experiencing dehydration at a race contains an exact amount of minerals for a specific amount of water - the same ratio we have in our blood.
  • That most isotonic drinks are not isotonic at all?
  • That the isotonic drink Ndure was tested and assisted in development by a Slovenian kinesiologist who studied in the UK, Dr Tim Podlogar, who loves the product? You can find his video content here.
  • That one of the first female cyclists, who tested the isotonic drink Ndure, was a two-time time trial champion Mateja Roglič?
  • That the result on races is heavily influenced by the amount of ingested carbohydrates (without digestive issues), which is why professional teams mix their own energy-hydration drinks?
  • That we can best promote regeneration by using an appropriate isotonic drink and/or isotonic gels - studies have shown that the greater the amount of ingested carbohydrates, the lesser the number of muscle injuries. The greater the effort - a typical example is this study - the more an isotonic drink is needed.
  • That Prof. Rowlands is so enthusiastic about cycling that he suggested to the University to work only half time, a 4-hour workday, so he could cycle every day? Who then wouldn't trust an isotonic drink with his ratio?
Do you want to know more? Check out the NDURANZ SCIENCE VLOG SECTION WITH DR. TIM PODLOGAR

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