Do gels upset your stomach? What science suggests about practicing race nutrition
A 2025 review helps explain gut training and the limits of product tolerance claims.
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Your stomach felt uncomfortable during a long session, and the gel became the first suspect. That connection deserves investigation, but it is not a complete explanation. Intake, drink concentration, effort, heat and individual history can all contribute.
What the review found
A 2025 systematic review included 29 studies on nutrition strategies and gastrointestinal symptoms in endurance exercise. Its abstract reports promising findings for gut-training protocols and emphasizes individualization. It does not identify a solution for every athlete.
It also describes no demonstrated advantage of hydrogel carbohydrate products over conventional products in that evidence base. A technology on a package should therefore not automatically become a guarantee of tolerance.
Know what changed during testing
In practice, keep a brief diary. Record food and drink, timing, fluid volumes and intensity. Describe the symptom: bloating, nausea, urgency and pain are not interchangeable observations.
Imagine two sessions: in one, you change your gel, breakfast and intensity; in the other, you keep your usual conditions and change only the carbohydrate format. The second comparison is likely to provide more useful everyday information, although it is not a controlled clinical experiment.
Where the product fits
True Energy Gel is one commercial option to discuss within a plan. Check the ingredients and intended use, test in an appropriate setting and record your response. Neither an ingredient nor a carbohydrate ratio guarantees freedom from symptoms.
What not to conclude
Feeling better after changing gels does not prove the previous product was unsuitable: other conditions may have changed. Continuing through significant pain is not a required adaptation process either. Bleeding, severe symptoms or recurrent problems call for professional assessment.
Broad self-imposed dietary restrictions may create additional difficulties. The review discusses specific strategies, but that does not mean every athlete should eliminate food groups.
Take a record to your appointment, describe the symptom and agree on one test at a time. The main lesson is to investigate the whole strategy before searching for a gel that promises to fix everything.
Educational content for adults; it does not replace individual assessment and planning with a qualified professional.
References
Cada um no seu ritmo. Juntos no caminho.