GoldNutrition Carb Max Gel Test

GoldNutrition Carb Max: a gel born in Portugal, rigorously tested, and validated for a high-level objective

In the world of endurance, there was a time when only the ability to “take it” mattered: the kilometers, the elevation gains, the suffering. Today, performance has become a matter of precision. Of mastered details. And among these details, nutrition plays a central role. To drink or not to drink, to refuel or not — these are questions that elites no longer hesitate to answer. Because science has spoken. And it clearly states: at high intensity, for durations exceeding one hour, energy must be supplied continuously. This principle is now embodied by a reference protocol: the absorption of 80 to 90 g of carbohydrates per hour of racing. A performance standard now adopted in major marathons, trail running, Ironman, but also in half-marathons competed at maximum intensity. But it is still necessary to find the right product, the right dosage, and above all, the assurance that it will perform during effort. This is what a rigorous test allowed to evaluate with the GoldNutrition Carb Max gel.

By Jeff Tatard – Photos: DR

A serious, structured approach… and 100% field-tested

The project is simple: to evaluate the real effectiveness of an energy gel marketed as high-performing, practical, and well-tolerated. And not in a laboratory. But in the legs. For this, we enlisted Tiago Tatard, an 18-year-old French runner, 10th in the national ranking for half-marathon in his category, and currently in full preparation for the French Half-Marathon Championships in Vannes, on September 14th.

But here, Tiago is first and foremost a tester. An athlete, certainly, but also a first-year student at Audencia, a renowned business school. And this dual role is reflected in his method: organization, rigor, strategy. The test was therefore not taken lightly: it was conceived, structured, and integrated into a coherent preparation protocol.

For our product test, this time it’s a young athlete and business school student who will put the Gold Nutrition gel to the test… not in a laboratory, but on the asphalt.

The scientific background: why aim for 80 g/h of carbohydrates?

For a long time, recommendations for endurance sports revolved around 30 to 60 g of carbohydrates per hour. But work carried out over the past fifteen years — notably by Jeukendrup, Burke, or Stellingwerff — has shown that by combining two types of sugars (glucose + fructose), intestinal absorption capacity could be considerably increased, thus delaying fatigue.

The key: using different transporters (SGLT1 for glucose, GLUT5 for fructose), while respecting an optimal 2:1 ratio, to reach up to 90–100 g/h of carbohydrates without digestive discomfort. But to achieve this, one must train to digest. And an adapted product is needed. The product tested: Carb Max Energy Gel 60g – GoldNutrition

The Carb Max Energy Gel, in its box of 16 format: 40 g of net carbohydrates per unit, a concentrate of performance born in Portugal. The GoldNutrition Carb Max Gel seems to meet all these requirements. Here are its key points:

40 g of carbohydrates per gel
Optimized glucose/fructose ratio
Fluid texture, absorbable without water if necessary
Well-tolerated neutral flavor
Zero superfluous additives
Certified free of doping substances
Produced in Portugal, tested in an independent laboratory

Each gel weighs 60 g, but contains 40 g of net carbohydrates, an excellent yield. This is exactly the targeted quantity every 30 minutes to reach the famous 80 g/h.

Field test: a demanding protocol, true to race reality

In order not to settle for simple impressions or a one-off test, the protocol set up by Tiago was designed with a view to real physiological adaptation, with variables modeled on the exact conditions of race day.

For several weeks, the Carb Max gel was systematically integrated into all “high glycogen” sessions, i.e., the key sessions of his preparation, where energy intake directly conditions the quality of training and the ability to repeat it over time.

Tiago in action: gel intake followed by controlled hydration — a precise routine, repeated at each key session.

The protocol was structured around the following elements:

Realistic outdoor temperatures, between 22°C and 30°C, to simulate the heat expected in September in Vannes. This data is essential, as heat accentuates digestive risks — yet no adverse effects were noted.
Effort duration between 1h and 1h30, corresponding exactly to the effort time targeted on championship day.
“Half-marathon” calibrated intensity, i.e., at threshold, with a high heart rate, where digestion is often compromised.
Gel intake with water only, without sugary drinks or caffeine, to isolate the effect of the gel itself.
Repeated application, with an intake every 30 minutes, identical to what will be done on D-day, in order to also train the digestive system to receive a high glycemic load.

What Tiago implemented is not a simple “taste” test, but rather a progressive nutritional training, as recommended by the latest scientific research. The objective: to accustom the gastrointestinal system to digest 80 g/h of carbohydrates, while maintaining a logic of maximum performance during effort.

60 minutes of effort, always high intensity: here, the second gel intake, essential to maintain the pace until the end.

« You don’t improvise a refueling strategy at that level. It had to be tested, proven, and above all integrated into my routines before the race. »

Tiago therefore took a gel before each start of a long session, then every 30 minutes, even during threshold sessions or long VMA blocks, in order to reproduce the mechanical demands of the race. He thus “trained his gut,” according to the recommendations of specialists like Asker Jeukendrup.

And the results are clear:

Zero digestive discomfort
No gastric reflux
No feeling of heaviness
No sudden variations in perceived energy
Sensation of stable absorption, without “peak” or “crash”

In short: the product brilliantly passed the field test. So much so that it was chosen as the official nutritional solution for race day. It’s no longer a test; it’s a validation.

The D-day nutritional plan is now set

On September 14th, during the French Championships, Tiago will take no risks. The protocol validated in training will be reproduced identically, with 3 Carb Max gels carried in his shorts pockets:

1st gel → just before the start
2nd gel → at the 30th minute of the race
3rd gel → at the 60th minute

This plan ensures a constant intake of 80 g/h, perfectly assimilated, to maintain a high level of intensity until the finish.

The GoldNutrition logic: quality, simplicity, performance

GoldNutrition is a brand founded in Portugal, whose philosophy is simple: to formulate clear, effective, tested products, without superfluous elements.

Little known in France, it is gaining ground thanks to:

Its transparency on compositions
Its very competitive quality/price ratio
Its anti-doping commitment (products tested in an approved laboratory)
And a coherent range: proteins, gels, effort drinks, recovery products…

Carb Max fits into this logic. No flashy marketing, just a product that works, period.

The tester, Tiago Tatard: between academic rigor and sporting demands

This nutritional choice is not a mere athlete’s whim. It is also the reflection of a rational, almost entrepreneurial approach. Tiago is a young runner with high potential — but also a brilliant student at Audencia, who builds his decisions like one builds a business plan: through tests, validations, adjustments.

And in this logic, the Portuguese gel has become more than just fuel. It is a strategic choice, made consciously, after weeks of analysis.

Message 3bikes.fr: Never throw a gel in nature: performance does not excuse disrespect. Responsible athletes, responsible actions.

When nutrition becomes a weapon

This test is not a publicity stunt. It is the story of an intelligent approach, led by a young athlete who makes his decisions with the same rigor he puts into his training.

GoldNutrition’s Carb Max, a discreet but formidably effective Portuguese product, is now at the heart of his race strategy. Because on championship day, every minute will count. And to aim for the podium, every detail will too.