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Considerations: The best supplement to take
There is no "magic product," but there is a hierarchy of importance. For an amateur or professional cyclist in 2026, the absolute priority must be carbohydrate management during exertion. A drop in sugars (glycogen) compromises not only immediate performance but also the immune system and the speed of recovery in the following days.
Technical Note: Supplementation must always be tested in training before being used in a race, as intestinal tolerance is subjective and can be trained ("Training the gut").