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What is cyclic dextrin?
Cyclic dextrin, or highly branched cyclic dextrin, is a carbohydrate made from waxy corn starch. While maltodextrin is obtained by cutting starch into short fragments, cyclic dextrin is produced by a branching enzyme that reorganizes starch into closed, high molecular weight, and very homogeneously sized molecules.
The result is a white, fluid, barely sweet powder that dissolves without forming the thick syrup that some carbohydrates do. In terms of energy, there is no difference from other carbohydrate powders: approximately 4 kcal per gram, or 380 to 400 kcal per 100g, with no protein or fat. What distinguishes it is not its nutritional value, but its behavior in the stomach.
Why does low osmolality make a difference?
The osmolality of a drink depends on the number of dissolved particles, not their size. The same amount of carbohydrates cut into small molecules yields many particles and high osmolality; assembled into very large molecules, it yields few and osmolality remains low.
This is exactly the case with cyclic dextrin. Specifically:
- Gastric emptying is faster. A hypertonic drink stays in the stomach longer; a drink close to isotonic leaves faster, and carbohydrates become available sooner.
- Water absorption in the intestine is limited. This is the phenomenon that causes bloating, cramps, and accelerated transit with an overly concentrated drink.
- It can be more concentrated. While a maltodextrin-based drink becomes uncomfortable beyond 8g per 100ml, cyclic dextrin generally remains well-tolerated a little above this — useful when a lot of carbohydrates need to be consumed in a small amount of liquid.
This advantage is real, but it concerns digestive comfort, not the amount of energy provided. Gram for gram, one gram of cyclic dextrin and one gram of maltodextrin provide the same energy.
When is cyclic dextrin truly beneficial?
Its primary use is for intra-training during long sessions, starting from about 90 minutes of continuous effort: long bike rides, trail running, triathlon, very voluminous strength training sessions, or combat sports over a competition day. This is where rapid gastric emptying becomes a significant advantage, because you drink while moving.
Three other situations justify its use: sensitive stomachs that cannot tolerate any classic carbohydrate drinks, double sessions separated by a few hours, and efforts in hot weather, where hydration is key and a drink with low particle concentration is more comfortable. For prolonged efforts, a dose of electrolytes usefully complements the bottle.
Conversely, for a one-hour weight training session, it provides no measurable benefit. Glycogen reserves cover the effort without difficulty, and drinking carbohydrates during the session primarily adds calories.
Cyclic dextrin or maltodextrin: is the extra cost justified?
Let's be clear: cyclic dextrin costs several times the price per kilo of maltodextrin, for identical energy intake. This extra cost is justified in one specific case, and only one – where digestion is truly the limiting factor during long efforts.
- You lift weights three to five times a week, one hour per session – cyclic dextrin is not a good purchase. Water is sufficient during the session, and your carbohydrates belong in your meals.
- You ride for three hours, run a trail, or do two back-to-back sessions – it becomes relevant, especially if maltodextrin causes you stomach problems.
- You are simply looking to add calories – choose maltodextrin, rice cream, or oat flour, which are three times cheaper. The mass gain section and the hard gainer and lean gainer pages address this need.
One last point of honesty: studies available on cyclic dextrin most often involve small sample sizes. The physiological mechanism is solid and digestive tolerance is consistently reported by users; direct performance gains, however, are much more debated.
How to use it for intra-training?
- Quantity: endurance nutrition guidelines suggest a useful intake of between 30 and 60g of carbohydrates per hour of effort. Start with 30g and gradually increase.
- Dilution: 30 to 60g in 500 to 750ml of water, to be sipped regularly rather than all at once.
- Combination: it mixes easily with essential amino acids or electrolytes. Avoid adding a complete protein, which slows gastric emptying.
- Preparation: pour the powder into the liquid, not the other way around, then shake. It dissolves quickly and doesn't stick to the bottom of the bottle.
Like any sports drink strategy, this one should be tested during training, never on race day.
Frequently Asked Questions
What is cyclic dextrin?
A carbohydrate made from waxy corn starch, reorganized by a branching enzyme into very large, self-contained molecules. It is also called highly branched cyclic dextrin. Energetically, it is a carbohydrate powder like any other: about 4 kcal per gram, with no protein or fat. Its peculiarity is physical, not nutritional — because the molecules are large and few in solution, the drink exerts low osmotic pressure, leaves the stomach quickly, and causes little digestive discomfort at high concentrations.
Why take cyclic dextrin?
For one defensible reason: to consume a lot of carbohydrates during a long effort without upsetting your stomach. It is a product for digestive comfort, not a performance product: gram for gram, it provides exactly the same energy as maltodextrin, which is three times cheaper. If your sessions last one hour, if you digest classic carbohydrate drinks well, or if you are simply looking to add calories, it is not beneficial for you.
When should cyclic dextrin be taken?
During effort, and essentially beyond 90 minutes: long bike rides, trail running, triathlon, competition day, very voluminous strength training session. To be sipped regularly rather than swallowed all at once. It remains useful between two sessions separated by less than six hours, when a solid meal would not be suitable. Outside of these cases — before, after, or on rest days — its advantage disappears: ordinary starchy food does the same job for much less.
How much cyclic dextrin per session?
Between 30 and 60g of carbohydrates per hour of effort, the reference range in endurance nutrition. Dilute these 30 to 60g in 500 to 750ml of water. Start with 30g per hour and gradually increase: digestive tolerance to carbohydrates is built up over several weeks, it cannot be improvised. Beyond 60g per hour, the intake only becomes interesting by combining several types of sugars, which is a competition strategy to be developed with a professional.
Is cyclic dextrin and cluster dextrin the same thing?
The principle is the same. "Cluster Dextrin" is a registered trade name corresponding to a cyclic dextrin produced by a Japanese manufacturer; other cyclic dextrins exist under other names. The label usually specifies the exact ingredient, and that is the line to read: "highly branched cyclic dextrin" or the corresponding brand name.
Cyclic dextrin or maltodextrin?
Maltodextrin in the vast majority of cases, and this is advice that goes against our immediate commercial interest: same energy intake, several times lower price. Cyclic dextrin only becomes the best choice if digestion is your limiting factor for efforts over 90 minutes, or if you need to consume a lot of carbohydrates in a small amount of liquid. The test is simple: if your 6-8% maltodextrin drink goes down without problems, stick with it.
How can cyclic dextrin be replaced?
By maltodextrin diluted a little more, meaning more water for the same amount of carbohydrates: this solves many digestive problems, at the cost of a heavier bottle. Waxy maize is the other economical equivalent. Outside of exercise, no powdered substitute is necessary: rice, bread, fruits, or rice cream provide the same carbohydrates while providing satiety.
Is cyclic dextrin dangerous?
No, for the uses described here: it is a processed corn starch, an authorized food ingredient, with no fixed dose limit and no known toxicity. The only reported inconveniences are digestive and related to an overly concentrated drink — precisely what this product aims to avoid. Two honest caveats: it is a fast-absorbing carbohydrate, so it should be reserved for exercise and not integrated without medical advice in case of diabetes; and a sugary drink sipped for two hours maintains an environment favorable to cavities, so rinse your mouth at the end of the session.
Does cyclic dextrin make you gain weight?
Like any carbohydrate, it only causes weight gain if it creates a caloric surplus over the day. Consumed during a long effort, it is used for that effort. Taken at rest "for energy," it is a liquid caloric addition that does not satisfy hunger: the classic trap of all carbohydrate powders.
Does it contain gluten?
It is made from waxy corn, which does not contain gluten. However, check for trace mentions on flavored versions.
Can it be taken before or after a workout?
Yes, but its advantage largely disappears outside of exercise: at rest, an ordinary carbohydrate food does the same job for much less.
Is it suitable for people with diabetes?
It is a fast-absorbing carbohydrate. Any use must be validated by the treating physician.
Can it be mixed with whey?
In a post-workout shaker, yes. During exercise, it's better to stick to carbohydrates and possibly amino acids: a complete protein makes digestion heavier.
Where to buy cyclic dextrin?
In specialized sports nutrition stores and online — it's a niche product not found in supermarkets or pharmacies. Two points to check on the label: that the ingredient is clearly named "highly branched cyclic dextrin" and not just a simple maltodextrin, and that the powder is unflavored or that the flavors are clearly listed. Also compare the price per kilo: the difference between equivalent references is significant. Our references are available online, shipped throughout France and Europe, and in store in Vendargues, about ten minutes from Montpellier, with pick-up within two hours.
What can be found on the shelves?
We select cyclic dextrins whose ingredient is clearly identified on the label, with IO Genix, Sinob, and TrainedByJP ranges, some already combined with electrolytes for direct intra-training use. If digestion is not your problem, maltodextrin or waxy maize will cost you less for a comparable result.
An honest opinion in Vendargues, near Montpellier
This is typically the product we often advise against buying: cyclic dextrin is excellent, but it only serves a minority of practitioners. Describe your sessions to us in our Vendargues store, about ten minutes from Montpellier, and we will tell you if it is of interest to you. It's a ten-minute conversation that avoids an unnecessary purchase: the sports nutrition store near me page indicates opening hours and travel time from your location. We also ship throughout France and Europe.
The functioning of a highly branched cyclic dextrin, its dosages, and its real limits are detailed in our article on Cluster Dextrin for exercise.
Sources
- ANSES — Opinion on the update of recommended nutritional intakes for carbohydrates
- ANSES — Ciqual table of nutritional composition of foods
To be integrated into a varied and balanced diet and a healthy lifestyle.
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What is cyclic dextrin?
Cyclic dextrin, or highly branched cyclic dextrin, is a carbohydrate made from waxy corn starch. While maltodextrin is obtained by cutting starch into short fragments, cyclic dextrin is produced by a branching enzyme that reorganizes starch into closed, high molecular weight, and very homogeneously sized molecules.
The result is a white, fluid, barely sweet powder that dissolves without forming the thick syrup that some carbohydrates do. In terms of energy, there is no difference from other carbohydrate powders: approximately 4 kcal per gram, or 380 to 400 kcal per 100g, with no protein or fat. What distinguishes it is not its nutritional value, but its behavior in the stomach.
Why does low osmolality make a difference?
The osmolality of a drink depends on the number of dissolved particles, not their size. The same amount of carbohydrates cut into small molecules yields many particles and high osmolality; assembled into very large molecules, it yields few and osmolality remains low.
This is exactly the case with cyclic dextrin. Specifically:
- Gastric emptying is faster. A hypertonic drink stays in the stomach longer; a drink close to isotonic leaves faster, and carbohydrates become available sooner.
- Water absorption in the intestine is limited. This is the phenomenon that causes bloating, cramps, and accelerated transit with an overly concentrated drink.
- It can be more concentrated. While a maltodextrin-based drink becomes uncomfortable beyond 8g per 100ml, cyclic dextrin generally remains well-tolerated a little above this — useful when a lot of carbohydrates need to be consumed in a small amount of liquid.
This advantage is real, but it concerns digestive comfort, not the amount of energy provided. Gram for gram, one gram of cyclic dextrin and one gram of maltodextrin provide the same energy.
When is cyclic dextrin truly beneficial?
Its primary use is for intra-training during long sessions, starting from about 90 minutes of continuous effort: long bike rides, trail running, triathlon, very voluminous strength training sessions, or combat sports over a competition day. This is where rapid gastric emptying becomes a significant advantage, because you drink while moving.
Three other situations justify its use: sensitive stomachs that cannot tolerate any classic carbohydrate drinks, double sessions separated by a few hours, and efforts in hot weather, where hydration is key and a drink with low particle concentration is more comfortable. For prolonged efforts, a dose of electrolytes usefully complements the bottle.
Conversely, for a one-hour weight training session, it provides no measurable benefit. Glycogen reserves cover the effort without difficulty, and drinking carbohydrates during the session primarily adds calories.
Cyclic dextrin or maltodextrin: is the extra cost justified?
Let's be clear: cyclic dextrin costs several times the price per kilo of maltodextrin, for identical energy intake. This extra cost is justified in one specific case, and only one – where digestion is truly the limiting factor during long efforts.
- You lift weights three to five times a week, one hour per session – cyclic dextrin is not a good purchase. Water is sufficient during the session, and your carbohydrates belong in your meals.
- You ride for three hours, run a trail, or do two back-to-back sessions – it becomes relevant, especially if maltodextrin causes you stomach problems.
- You are simply looking to add calories – choose maltodextrin, rice cream, or oat flour, which are three times cheaper. The mass gain section and the hard gainer and lean gainer pages address this need.
One last point of honesty: studies available on cyclic dextrin most often involve small sample sizes. The physiological mechanism is solid and digestive tolerance is consistently reported by users; direct performance gains, however, are much more debated.
How to use it for intra-training?
- Quantity: endurance nutrition guidelines suggest a useful intake of between 30 and 60g of carbohydrates per hour of effort. Start with 30g and gradually increase.
- Dilution: 30 to 60g in 500 to 750ml of water, to be sipped regularly rather than all at once.
- Combination: it mixes easily with essential amino acids or electrolytes. Avoid adding a complete protein, which slows gastric emptying.
- Preparation: pour the powder into the liquid, not the other way around, then shake. It dissolves quickly and doesn't stick to the bottom of the bottle.
Like any sports drink strategy, this one should be tested during training, never on race day.
Frequently Asked Questions
What is cyclic dextrin?
A carbohydrate made from waxy corn starch, reorganized by a branching enzyme into very large, self-contained molecules. It is also called highly branched cyclic dextrin. Energetically, it is a carbohydrate powder like any other: about 4 kcal per gram, with no protein or fat. Its peculiarity is physical, not nutritional — because the molecules are large and few in solution, the drink exerts low osmotic pressure, leaves the stomach quickly, and causes little digestive discomfort at high concentrations.
Why take cyclic dextrin?
For one defensible reason: to consume a lot of carbohydrates during a long effort without upsetting your stomach. It is a product for digestive comfort, not a performance product: gram for gram, it provides exactly the same energy as maltodextrin, which is three times cheaper. If your sessions last one hour, if you digest classic carbohydrate drinks well, or if you are simply looking to add calories, it is not beneficial for you.
When should cyclic dextrin be taken?
During effort, and essentially beyond 90 minutes: long bike rides, trail running, triathlon, competition day, very voluminous strength training session. To be sipped regularly rather than swallowed all at once. It remains useful between two sessions separated by less than six hours, when a solid meal would not be suitable. Outside of these cases — before, after, or on rest days — its advantage disappears: ordinary starchy food does the same job for much less.
How much cyclic dextrin per session?
Between 30 and 60g of carbohydrates per hour of effort, the reference range in endurance nutrition. Dilute these 30 to 60g in 500 to 750ml of water. Start with 30g per hour and gradually increase: digestive tolerance to carbohydrates is built up over several weeks, it cannot be improvised. Beyond 60g per hour, the intake only becomes interesting by combining several types of sugars, which is a competition strategy to be developed with a professional.
Is cyclic dextrin and cluster dextrin the same thing?
The principle is the same. "Cluster Dextrin" is a registered trade name corresponding to a cyclic dextrin produced by a Japanese manufacturer; other cyclic dextrins exist under other names. The label usually specifies the exact ingredient, and that is the line to read: "highly branched cyclic dextrin" or the corresponding brand name.
Cyclic dextrin or maltodextrin?
Maltodextrin in the vast majority of cases, and this is advice that goes against our immediate commercial interest: same energy intake, several times lower price. Cyclic dextrin only becomes the best choice if digestion is your limiting factor for efforts over 90 minutes, or if you need to consume a lot of carbohydrates in a small amount of liquid. The test is simple: if your 6-8% maltodextrin drink goes down without problems, stick with it.
How can cyclic dextrin be replaced?
By maltodextrin diluted a little more, meaning more water for the same amount of carbohydrates: this solves many digestive problems, at the cost of a heavier bottle. Waxy maize is the other economical equivalent. Outside of exercise, no powdered substitute is necessary: rice, bread, fruits, or rice cream provide the same carbohydrates while providing satiety.
Is cyclic dextrin dangerous?
No, for the uses described here: it is a processed corn starch, an authorized food ingredient, with no fixed dose limit and no known toxicity. The only reported inconveniences are digestive and related to an overly concentrated drink — precisely what this product aims to avoid. Two honest caveats: it is a fast-absorbing carbohydrate, so it should be reserved for exercise and not integrated without medical advice in case of diabetes; and a sugary drink sipped for two hours maintains an environment favorable to cavities, so rinse your mouth at the end of the session.
Does cyclic dextrin make you gain weight?
Like any carbohydrate, it only causes weight gain if it creates a caloric surplus over the day. Consumed during a long effort, it is used for that effort. Taken at rest "for energy," it is a liquid caloric addition that does not satisfy hunger: the classic trap of all carbohydrate powders.
Does it contain gluten?
It is made from waxy corn, which does not contain gluten. However, check for trace mentions on flavored versions.
Can it be taken before or after a workout?
Yes, but its advantage largely disappears outside of exercise: at rest, an ordinary carbohydrate food does the same job for much less.
Is it suitable for people with diabetes?
It is a fast-absorbing carbohydrate. Any use must be validated by the treating physician.
Can it be mixed with whey?
In a post-workout shaker, yes. During exercise, it's better to stick to carbohydrates and possibly amino acids: a complete protein makes digestion heavier.
Where to buy cyclic dextrin?
In specialized sports nutrition stores and online — it's a niche product not found in supermarkets or pharmacies. Two points to check on the label: that the ingredient is clearly named "highly branched cyclic dextrin" and not just a simple maltodextrin, and that the powder is unflavored or that the flavors are clearly listed. Also compare the price per kilo: the difference between equivalent references is significant. Our references are available online, shipped throughout France and Europe, and in store in Vendargues, about ten minutes from Montpellier, with pick-up within two hours.
What can be found on the shelves?
We select cyclic dextrins whose ingredient is clearly identified on the label, with IO Genix, Sinob, and TrainedByJP ranges, some already combined with electrolytes for direct intra-training use. If digestion is not your problem, maltodextrin or waxy maize will cost you less for a comparable result.
An honest opinion in Vendargues, near Montpellier
This is typically the product we often advise against buying: cyclic dextrin is excellent, but it only serves a minority of practitioners. Describe your sessions to us in our Vendargues store, about ten minutes from Montpellier, and we will tell you if it is of interest to you. It's a ten-minute conversation that avoids an unnecessary purchase: the sports nutrition store near me page indicates opening hours and travel time from your location. We also ship throughout France and Europe.
The functioning of a highly branched cyclic dextrin, its dosages, and its real limits are detailed in our article on Cluster Dextrin for exercise.
Sources
- ANSES — Opinion on the update of recommended nutritional intakes for carbohydrates
- ANSES — Ciqual table of nutritional composition of foods
To be integrated into a varied and balanced diet and a healthy lifestyle.
