Strong human evidence
Colonocyte β-oxidation of microbial butyrate contributes to physiological epithelial hypoxia in the colon.
Evidence summary
Demonstrated in vitro (Donohoe 2011) and in animal models (Byndloss 2017). Mechanism well-supported across independent groups.
Representative citations
Limitations
Most evidence is animal/in vitro; human in vivo measurement of mucosal oxygen tension is limited.
Competing explanation
Mucosal hypoxia could be maintained by other oxygen-consuming processes (e.g., neutrophil activity) independent of butyrate oxidation.
What would weaken this claim
A human study showing intact mucosal hypoxia despite chronically suppressed colonocyte β-oxidation would weaken this claim.
Related pages
Educational mechanistic analysis only. Not medical diagnosis or treatment.