Gastric volume reduction

Gastric volume reduction refers broadly to medical interventions that decrease the functional size/capacity of the stomach. This can be accomplished surgically—for example, via sleeve gastrectomy where approximately three-fourths of the stomach is removed—or through less invasive endoscopic methods such as transoral suturing/plication. The primary goal is physical restriction leading to earlier satiation after smaller meals and sustained caloric deficit resulting in weight loss. These procedures also induce changes in gut hormone profiles—including reductions in ghrelin and increases in GLP‑1/PYY—which further suppress appetite and improve glucose metabolism. While highly effective for obesity management, these interventions carry risks including perioperative complications and long-term nutritional deficiencies if dietary supplementation is inadequate. Importantly, “gastric volume reduction” itself does not denote any single molecular entity but rather describes an anatomical change produced by diverse procedural approaches.[1][2][4][5][10]

Other names

Stomach volume reductionGastric capacity reductionBariatric restriction

Procedures that achieve gastric volume reduction work via: - Physical restriction—reducing stomach reservoir capacity so less food can be ingested before feeling full[5][10]. - Hormonal modulation—altering levels of hormones such as ghrelin (decreases hunger), GLP‑1 and PYY (increase satiety)[1]. - Neuromodulation—affecting vagal signaling related to hunger/satiety. Some pharmacologic agents slow gastric emptying or modulate gut hormones but do not physically reduce stomach size.