Cayenne Pepper for Appetite Control

Research suggests that capsaicin, the active compound in cayenne pepper, may support appetite control and weight management through several biological pathways, including reducing hunger, increasing feelings of fullness, boosting energy expenditure through thermogenesis, and influencing gut hormones and the microbiome. The available evidence comes primarily from narrative and systematic reviews synthesizing laboratory, animal, and human clinical data, with the large majority of reviews pointing in a supportive direction, though a 2019 systematic review of plant-based appetite suppressants found no supplement produced consistent effects across trials, and a 2018 review of the underlying receptor mechanism reported mixed results from human supplementation studies. Studies indicate that while the proposed mechanisms are biologically plausible and span multiple systems including brown adipose tissue activation, gut barrier integrity, and sympathetic nervous system signaling, the effective doses varied considerably across human trials and few long-term, well-controlled clinical studies have been conducted. Overall, the body of research is promising but still preliminary, and researchers across multiple reviews consistently call for larger, more rigorous human trials before firm conclusions can be drawn about cayenne pepper or capsaicin as a reliable appetite control strategy.