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Nutrition

NSAID Marathon Gut Risk

NSAID marathon gut risk is stomach and intestinal irritation from pre-run ibuprofen or naproxen—worse with heat, dehydration, and long ischemic efforts.

NSAID marathon gut risk rises when ibuprofen or naproxen is taken before or during long runs to mask pain—irritating the stomach lining and increasing intestinal permeability under ischemic stress. Combined with dehydration and heat, GI bleeding risk climbs.

Prefer load management and clinician-guided pain plans.

Common questions

  • Is one ibuprofen before a race safe for everyone?

    No—kidney stress, gut bleeding, and interactions vary by person and heat load. If you use NSAIDs, discuss race-week dosing with a clinician, not only training partners.

Related guide

Meal Planning Made Simple: A Beginner's Guide to Balanced Nutrition →

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