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Beyond Maltodextrin: Real-Food Endurance Fuel for Singapore Athletes
The Real Fuel Difference: Why We Look Beyond Maltodextrin for Endurance Nutrition
Why bonking, crashing, cramping, and gut discomfort are often signs of a fuelling system that does not match the athlete — not simply a lack of effort.
1. Introduction: When Energy Gels Do Not Work the Way Athletes Expect
You took the gel. You expected energy.
Instead, your stomach turned, your legs faded, or your race plan fell apart.
For many runners, cyclists, triathletes, HYROX athletes, and active individuals, the problem is not always fitness. It is often fuelling.
Energy gels are designed to help athletes maintain carbohydrate availability during sustained effort. But not all gels are tolerated equally — and not all fuelling approaches suit every athlete, every gut, or every climate.
Maltodextrin-based formulas are common in sports nutrition because they deliver glucose-based energy in a concentrated, fast-digesting form. For some athletes, they perform well. But for others — particularly those training and competing in hot and humid conditions — the experience can involve bloating, gut discomfort, unstable energy, or a fuelling plan that breaks down under real race pressure.
That is why RealFUEL+ looks beyond maltodextrin.
Not because maltodextrin is automatically problematic. But because endurance nutrition should not be reduced to one carbohydrate system. Practical fuelling requires consideration of energy availability, gut tolerance, hydration, carbohydrate source, caffeine use, sweat loss, pacing, and the athlete's ability to repeat the plan across training and competition.
This is the Real Fuel difference.
Before choosing your next energy gel, one question is worth asking:
Does your fuel match your body, your event, and your climate?
That is where the Real Fuel approach begins. Individual responses will vary.
2. What Bonking, Crashing, and Cramping Really Mean
Athletes often use the terms "bonk," "crash," and "cramp" as though they describe the same problem.
They do not. Each points to a different failure point in the fuelling system.
| Athlete Concern | What Research Suggests It Points To |
|---|---|
| Bonking | Low carbohydrate availability, depleted glycogen stores, or poorly timed fuelling [1] |
| Crashing | Unstable fuelling rhythm, over-reliance on caffeine, or under-fuelling relative to effort [1] |
| Cramping | A multi-factorial issue involving fatigue, heat, sweat loss, sodium balance, pacing, neuromuscular stress, and individual susceptibility [2, 3] |
| Gut upset | Concentrated carbohydrate intake, insufficient fluid, high exercise intensity, untrained gut, or individual ingredient response [4] |
The key point from the research is this: these problems are rarely caused by one ingredient alone. They typically reflect a breakdown in the full fuelling system. [1]
An athlete can take a gel and still bonk if fuelling began too late. They can take on fluid and still cramp if fatigue, sweat loss, sodium intake, heat, and pacing are not managed together. They can use caffeine and still fade if there is insufficient carbohydrate behind the effort.
That is why endurance nutrition is better understood as a system — not a single product decision. These are research findings in specific study populations and do not imply the same outcomes will occur in all individuals.
3. What Is Maltodextrin?
Maltodextrin is a glucose-based carbohydrate commonly used in energy gels, sports drinks, powders, and processed foods. It is produced through the partial hydrolysis of starch, resulting in a carbohydrate that is rapidly digested and absorbed. [4]
Maltodextrin became widely used in sports nutrition because of several practical characteristics:
| Why Brands Use Maltodextrin | Practical Reason |
|---|---|
| Fast carbohydrate delivery | Associated with rapid glucose availability in research [4] |
| Low perceived sweetness | Allows higher carbohydrate loads without excessive sweetness |
| Formulation flexibility | Works effectively in gels, drinks, and powder formats |
| Cost efficiency | Suitable for large-scale sports nutrition manufacturing |
| Flavour neutrality | Easy to combine with other ingredients and flavourings |
This is why many conventional energy gels are maltodextrin-led.
To be clear: maltodextrin is not automatically unsuitable. It is a functional carbohydrate ingredient. The more relevant question is whether it is the right carbohydrate system for every athlete, every gut, every climate, and every fuelling situation.
For RealFUEL+, that answer is: not always. And that distinction is worth understanding.
4. Why Maltodextrin-Heavy Gels May Not Suit Every Athlete
Maltodextrin-based gels are often described in marketing as efficient fuel. In some contexts and for some athletes, that characterisation is consistent with the research. [4]
But what performs on paper does not always translate to comfortable, repeatable use in real training and racing conditions — particularly in Singapore and ASEAN, where heat, humidity, sweat loss, and GI stress present additional physiological demands. Individual responses will vary.
4.1 Gut Tolerance During Exercise
During endurance exercise, the digestive system is already under pressure. Blood flow is redirected toward working muscles and thermoregulation, reducing the resources available for digestion. [4]
Research suggests that GI discomfort during exercise may be influenced by a combination of factors: concentrated carbohydrate intake, insufficient fluid co-ingestion, high exercise intensity, heat stress, poor fuelling timing, and individual gut sensitivity. [4]
For some athletes, maltodextrin-heavy gels may feel harder to tolerate under these combined conditions. These are research findings in specific study populations and do not imply the same experience for all individuals.
4.2 The Role of Fluid Co-Ingestion
Many energy gels are formulated as concentrated products. Research suggests that taking concentrated gels without adequate water may increase the osmotic load in the gut and contribute to GI discomfort in some individuals. [4]
Texture, concentration, water intake, and timing all interact. A gel is not only about its carbohydrate content — the context in which it is taken matters.
4.3 Carbohydrate Is Not Hydration
A maltodextrin-based gel may contribute to carbohydrate availability, but it does not address fluid or electrolyte losses from sweat. [5]
In Singapore's climate, athletes may experience significant fluid and sodium losses during long sessions. Treating carbohydrate intake and hydration as the same concern is a common fuelling error. They are separate physiological requirements that need to be managed together.
4.4 Cramping Is Multi-Factorial
Research on exercise-associated muscle cramps indicates the condition is multi-factorial. Possible contributors identified in the literature include neuromuscular fatigue, sweat loss, electrolyte balance, hydration status, heat exposure, pacing decisions, and individual susceptibility. [2, 3]
No carbohydrate gel — regardless of its formulation — should be positioned as a cramp prevention solution. A more evidence-consistent approach is to manage the full picture: pacing, training load, heat exposure, hydration, sodium intake, carbohydrate availability, muscle fatigue, and individual cramp history. These are research findings in specific study populations.
4.5 Reactive Fuelling and Timing
Research on carbohydrate availability during exercise supports a proactive fuelling approach — maintaining energy availability before depletion occurs rather than responding after fatigue sets in. [1]
A gel taken after the athlete is already fading may not restore a race plan that has already broken down. Timing and fuelling rhythm matter as much as the product itself.
5. Maltodextrin Is Not the Enemy. Poorly Matched Fuelling Is.
This is the most important distinction in this article.
RealFUEL+ does not position maltodextrin as an ingredient to avoid. That framing would be scientifically reductive. Maltodextrin is a functional carbohydrate ingredient that has been studied in sports nutrition for decades and works appropriately for many athletes in many contexts. [4]
The issue is when maltodextrin-based gels are treated as a universal solution without regard for individual variation.
Athletes differ in gut tolerance, sweat rate, caffeine sensitivity, fuelling experience, event duration, exercise intensity, heat adaptation, hydration behaviour, and ingredient preferences. Research consistently shows that individual responses to fuelling strategies vary considerably. [1, 4]
The better question is not: "Is maltodextrin good or bad?"
The better question is: "Does this fuelling system match the athlete, the event, the climate, and the gut?"
That is where RealFUEL+ takes a considered position.
6. Why RealFUEL+ Looks Beyond Maltodextrin
At RealFUEL+, looking beyond maltodextrin does not mean removing carbohydrate from the fuelling equation. Carbohydrates remain essential for endurance exercise. [1]
It means choosing a different carbohydrate philosophy — one based on food-derived ingredients that athletes can recognise, understand, and tolerate across real training conditions.
| Maltodextrin-Led Approach | Real-Food Fuel Approach |
|---|---|
| Glucose polymer-based carbohydrate | Honey-based carbohydrate source |
| Highly processed carbohydrate base | Food-derived ingredient base |
| Fast fuel focus | Fuel, palatability, and ingredient transparency |
| Widely used in mass-market sports nutrition | Designed for athletes seeking food-derived alternatives |
| Appropriate for many athletes in many contexts | An alternative for athletes who prefer recognisable ingredient sources |
| Requires adequate water and correct timing | Requires adequate water and correct timing |
This is not a claim that real-food ingredients are superior in performance terms. It is a recognition that some athletes prefer a fuelling option with a different ingredient profile — one that feels closer to food and further from formula.
This approach also connects with the broader RealFUEL+ positioning introduced in our beetroot article: bio-functional food ingredients should be framed with evidence, responsible claims, and realistic expectations — not hype or guaranteed outcomes.
Individual responses to both approaches will vary.
7. The Real Fuel Difference
The Real Fuel difference is not solely about carbohydrate source.
It is about how we approach endurance nutrition as a whole.
Real ingredients Athletes should be able to identify and understand what is in their fuel. Food-derived carbohydrate sources such as honey offer a recognisable ingredient profile. This matters to athletes who prioritise ingredient transparency in their nutrition choices.
Practical fuelling A product must fit into a real fuelling plan. That means athletes need to understand carbohydrate per serving, appropriate timing, water requirements, and how often to consume the product during training and competition.
Gut tolerance The most effective fuel is not the one with the most aggressive marketing claim. It is the one the athlete can tolerate and repeat during real training and competition. Individual GI tolerance varies considerably across athletes and conditions.
Responsible claims RealFUEL+ does not claim that any gel prevents bonking, eliminates cramps, or guarantees performance outcomes. These outcomes depend on the full athlete system — training, fuelling, hydration, pacing, sleep, recovery, and individual response.
Singapore relevance In Singapore's heat and humidity, fuelling strategies from cooler-climate race guides may not transfer directly. Athletes need to account for elevated sweat rates, sodium loss, fluid strategy, gut comfort in heat, and how products behave during tropical conditions.
8. Carbohydrate Still Matters
Looking beyond maltodextrin does not mean reducing carbohydrate intake.
Carbohydrates remain one of the most important fuel sources for endurance exercise. Research commonly explores intake ranges of approximately 30–60 g of carbohydrate per hour during sustained endurance efforts, with variation depending on duration, exercise intensity, carbohydrate source, and individual gut tolerance. [1]
The issue is not whether athletes need carbohydrate. They do.
The issue is the carbohydrate source, its delivery format, its practical tolerability, and whether the overall fuelling plan fits the athlete's event and individual physiology.
For some athletes, maltodextrin-based gels will continue to be an appropriate choice. For others, a food-derived alternative may offer a different ingredient experience that better suits their preferences and tolerance. These are individual decisions that should be tested in training — not on race day.
9. Why Singapore Athletes Should Consider Their Fuelling System Carefully
Singapore athletes train and compete in a specific environment that places distinct demands on fuelling strategy.
Heat and humidity can increase the physiological cost of the same pace. Sweat losses may be higher than in cooler climates. Fluid requirements may increase. GI comfort can become more variable under heat stress.
A gel that some athletes tolerate in cool conditions may feel different in tropical heat — though individual responses vary significantly and this is not a guaranteed experience for all athletes.
For Singapore runners, cyclists, triathletes, HYROX athletes, and active individuals, the relevant question is not simply: "Which gel delivers the most energy?"
A more practical question is: "Which fuel can I tolerate, repeat, and trust in my specific training and race conditions?"
That means testing fuel during training before race day. It means understanding the water requirements of each product. It means being clear on caffeine content and how it fits your personal tolerance. It means recognising that cramps, bonking, and gut discomfort often reflect system failure — not a single missing ingredient.
In Singapore's climate, the most practical fuel is not always the most concentrated formula. It is often the one the athlete can consistently use across the full training and race cycle. Individual responses will vary.
10. What Athletes Should Look For in an Energy Gel
Before selecting an energy gel, athletes should evaluate more than flavour.
| What to Check | Why It Matters |
|---|---|
| Carbohydrate per serving | Helps plan hourly fuelling intake within research-explored ranges |
| Ingredient source | Helps athletes understand what they are consuming |
| Caffeine amount | Prevents unintended overuse and associated sleep disruption |
| Sodium and electrolytes | Relevant for sweat-heavy sessions in hot conditions |
| Texture and concentration | Affects practical tolerability during sustained effort |
| Water requirement per serving | Important for GI comfort — concentrated gels generally need co-ingestion with water |
| Timing guidance | Proactive fuelling is more consistent with research than reactive use [1] |
| Training tolerance history | No new fuel should be tested for the first time on race day |
A practical fuelling plan should answer three questions:
- Can I digest this during sustained effort?
- Can I repeat this intake across the full event duration?
- Does this fit my event format, climate, and training intensity?
If the answer to any is uncertain, the product may not be wrong — it may simply need to be tested more thoroughly during training before it is trusted in competition.
11. RealFUEL+ View: Real Food, Real Function, Responsible Claims
RealFUEL+ looks beyond maltodextrin because we believe endurance nutrition should be evaluated not only on carbohydrate delivery speed, but on practical tolerability, ingredient transparency, and whether the full fuelling system matches the athlete's real conditions.
A maltodextrin-based gel may be associated with fast carbohydrate availability in research. [4] But endurance performance is not built on carbohydrate delivery alone. It depends on the interaction between fuel, hydration, electrolytes, gut tolerance, caffeine use, pacing, and training consistency.
Our position is straightforward:
Maltodextrin is not the enemy. Poorly matched fuelling is.
That is why we focus on food-derived endurance nutrition, transparent labelling, and evidence-framed education. We want athletes to understand what fuel can do, what it cannot do, and how to use it sensibly across their training and race cycles.
No inflated claims. No "magic energy" language. No pretending one gel resolves every fuelling challenge.
Just real fuel, for real conditions, with realistic expectations.
Individual responses will vary.
Conclusion: The Real Fuel Difference
Athletes do not bonk, crash, cramp, or experience gut discomfort because of insufficient effort.
More often, their fuelling system does not match the physiological demand being placed on it.
Maltodextrin-based gels have a legitimate place in sports nutrition and are appropriate for many athletes in many contexts. But they are not a universal answer — and for athletes who prefer food-derived ingredients, clearer labels, and a more recognisable fuelling experience, looking beyond maltodextrin is a considered and practical choice.
The Real Fuel difference is not about rejecting sports science. It is about applying it more thoughtfully.
For Singapore and ASEAN athletes training in heat, humidity, and real-world conditions, endurance fuel must be more than fast. It must be practical, tolerable, transparent, and repeatable across the full training and race cycle.
That is why RealFUEL+ looks beyond maltodextrin.
Food supplements should not be used as a substitute for a balanced diet. This content is for general educational purposes only and is not intended for the prevention, treatment, or cure of any disease. Individual responses to food, caffeine, carbohydrates, and sports nutrition products vary. Consult a doctor or qualified healthcare professional if you are on medication, have an existing health condition, experience persistent cramps, or have concerns about blood sugar, digestion, hydration, or exercise tolerance. Keep all supplements out of the reach of young children.
Educational note: This article is intended as general wellness information only. It does not constitute medical advice, diagnosis, or treatment. The products and ingredients discussed are food products, not medicines. Research referenced here reflects findings from independent scientific studies and does not imply that the same outcomes will occur in all individuals. Individual responses to dietary supplements, carbohydrates, caffeine, and sports nutrition products vary. Consult your doctor before starting any new supplement or nutrition protocol, especially if you are on medication or have an existing health condition.
References
[1] Burke LM, Hawley JA, Wong SHS, Jeukendrup AE. Carbohydrates for training and competition. J Sports Sci. 2011;29(Suppl 1):S17–27. https://doi.org/10.1080/02640414.2011.585473
[2] Miller KC, Mack GW, Knight KL, et al. Reflex inhibition of electrically induced muscle cramps in hypohydrated humans. Med Sci Sports Exerc. 2010;42(5):953–961. https://doi.org/10.1249/MSS.0b013e3181c0647e
[3] Giuriato G, Pedrinolla A, Schena F, Venturelli M. Muscle cramps: A comparison of the two leading hypotheses. J Electromyogr Kinesiol. 2018;41:89–95. https://doi.org/10.1016/j.jelekin.2018.02.002
[4] Hofman DL, van Buul VJ, Brouns FJPH. Nutrition, health, and regulatory aspects of digestible maltodextrins. Crit Rev Food Sci Nutr. 2016;56(12):2091–2100. https://doi.org/10.1080/10408398.2015.1020341
[5] Sawka MN, Burke LM, Eichner ER, et al. American College of Sports Medicine position stand: Exercise and fluid replacement. Med Sci Sports Exerc. 2007;39(2):377–390. https://doi.org/10.1249/mss.0b013e31802ca597
[6] Earnest CP, Lancaster SL, Rasmussen CJ, et al. Low vs. high glycemic index carbohydrate gel ingestion during simulated 64-km cycling time trial performance. J Strength Cond Res. 2004;18(3):466–472. https://doi.org/10.1519/R-13541.1
[7] HSA Singapore. Regulatory overview of health supplements. https://www.hsa.gov.sg/health-products-regulation/health-supplements
[8] HSA Singapore. Advertising guidelines for health supplements. https://www.hsa.gov.sg/health-products-regulation/health-supplements/advertising
Frequently Asked Questions
Q: Is maltodextrin bad for athletes?
A : Maltodextrin is not automatically unsuitable. It is a glucose-based carbohydrate associated with rapid digestion that is widely used in sports nutrition. [4] The relevant question is whether a maltodextrin-heavy gel suits the individual athlete's gut tolerance, event format, hydration plan, and training conditions. Individual responses will vary.
Q: Why does my stomach hurt after taking an energy gel?
A :Research suggests gut discomfort during exercise may be influenced by exercise intensity, heat stress, hydration status, carbohydrate concentration, timing, and individual gut tolerance. [4] A gel may be harder to tolerate when taken without adequate water, used during high-intensity effort, or introduced during competition without prior training exposure to that product. Individual responses vary considerably.
Q: Can maltodextrin cause cramping?
A :Research on exercise-associated muscle cramps indicates the condition is multi-factorial. Possible contributors identified in the literature include neuromuscular fatigue, sweat loss, electrolyte balance, hydration status, heat exposure, pacing decisions, and individual susceptibility. [2, 3] No energy gel should be positioned as a guaranteed cramp prevention solution. These are research findings in specific study populations.
Q: Why does RealFUEL+ look beyond maltodextrin?
A :RealFUEL+ focuses on food-derived endurance nutrition because we believe athletes benefit from ingredient transparency, practical tolerability, and a fuelling system suited to their individual needs.
Looking beyond maltodextrin does not mean removing carbohydrate — it means offering a food-derived carbohydrate alternative for athletes who prefer that approach. Individual responses will vary.
Q: Do athletes still need carbohydrates during endurance exercise?
A :Yes. Carbohydrates remain important for sustained endurance exercise. Research commonly explores intake of approximately 30–60 g per hour during longer efforts, with variation based on duration, intensity, carbohydrate source, and individual gut tolerance. [1] The question is which carbohydrate source and fuelling rhythm best suits the individual athlete.
Q: Should I test a new gel on race day?
A :No. Athletes should test any new gel, caffeine source, or fuelling strategy during training first — including in conditions similar to the target event. Race day should be used to execute a fuelling plan that has already been practised and assessed for individual tolerance.
Q: What should I consider if regular gels do not suit me?
A :Start by reviewing your complete fuelling system: timing relative to exercise, water co-ingestion, carbohydrate amount per hour, caffeine intake, electrolyte strategy, and individual gut tolerance. A food-derived alternative may be worth testing during training if you prefer a recognisable ingredient profile. Always test during training sessions before relying on any product in competition. Individual responses vary.
Q: Does honey work as a carbohydrate source for endurance sport?
A :Honey is a food-derived source of carbohydrates that has been explored in endurance nutrition research as a practical fuel option. [6] It provides fast-digesting carbohydrates and is palatable for many athletes during sustained effort. Whether it suits an individual athlete depends on personal tolerance, preference, and how it fits into a complete fuelling plan. Individual responses will vary.