Taking NSAIDs is linked to increased gaps between gut lining cells, which may allow harmful substances to enter the bloodstream and trigger inflammation elsewhere in the body.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
A systematic review would determine whether NSAID use consistently increases intestinal permeability and systemic inflammatory markers across human populations.
A systematic review and meta-analysis of all published randomized controlled trials and prospective cohort studies in adults taking NSAIDs for ≥2 weeks, measuring intestinal permeability (lactulose/mannitol ratio) and systemic inflammatory markers (CRP, IL-6, TNF-α) pre- and post-treatment.
An RCT would determine whether NSAID administration causally increases intestinal permeability in healthy humans.
A double-blind, placebo-controlled trial of 60 healthy adults randomized to receive naproxen 500 mg twice daily or placebo for 14 days, with primary outcome: change in intestinal permeability measured by lactulose/mannitol urinary excretion ratio.
A prospective cohort would determine whether long-term NSAID users develop higher intestinal permeability and systemic inflammation over time compared to non-users.
A prospective cohort study following 500 adults with chronic pain, measuring intestinal permeability and serum CRP at baseline and annually for 5 years, stratified by NSAID use (dose, duration), adjusting for diet, smoking, and comorbidities.
A case-control study would assess whether patients with NSAID-induced GI injury have higher intestinal permeability than matched controls without injury.
A case-control study comparing 80 patients with NSAID-induced small bowel ulcers (via capsule endoscopy) to 160 matched controls without ulcers, measuring intestinal permeability via lactulose/mannitol test and serum zonulin.
A cross-sectional study would identify whether individuals currently taking NSAIDs have higher intestinal permeability than non-users at a single time point.
A cross-sectional analysis of 300 adults, measuring intestinal permeability (lactulose/mannitol ratio) and comparing levels between those currently taking NSAIDs (≥30 days) and those not taking them, adjusting for age, BMI, and medication use.