Cayenne Pepper for Digestive Health

Research suggests that capsaicin, the active compound in cayenne pepper, plays a meaningful role in gastrointestinal health through several proposed mechanisms, including gastroprotection, gut barrier reinforcement, microbiome modulation, and activation of capsaicin-sensitive afferent neurons that appear to support the stomach's natural defenses. The body of evidence draws primarily from reviews published between 2005 and 2025, with findings generally pointing in a supportive direction across areas such as ulcer protection, mucus production, nutrient absorption, and even molecular pathways relevant to gastrointestinal cancers. Studies indicate, however, that the picture is not entirely straightforward — some reviews note that capsaicin's effects can vary depending on concentration and context, with higher or chronic intake associated with reported digestive side effects, and one randomized controlled trial identified capsaicin as a metabolite linked to diarrhea in certain conditions. The overall evidence base, while directionally encouraging, consists largely of reviews and mechanistic studies rather than robust clinical trials, which means definitive conclusions about real-world digestive benefits in humans remain limited and warrant further investigation.