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Postoperative individuals are particularly vulnerable due to gastrointestinal dysfunction, reduced nutrient intake, systemic inflammation, and treatment-induced metabolic stress. This condition is associated with higher complication rates, delayed recovery, chemotherapy intolerance, and decreased survival, underscoring the importance of early detection and effective nutritional management. This narrative review integrates and synthesizes recent evidence from clinical and experimental studies that explore the pathophysiology, diagnosis, and nutritional management of sarcopenia in gastric cancer. The review emphasizes key nutritional risk factors, assessment tools, and intervention strategies applicable to both preoperative and postoperative care. Validated methods such as SARC-F (strength, assistance with walking, rise from a chair, climb stairs, and falls), dual-energy X-ray absorptiometry, and computed tomography imaging play central roles in identifying muscle loss and functional decline. Evidence suggests that protein-enriched diets, branched-chain amino acids, omega-3 fatty acids, and micronutrients such as vitamin D and antioxidants help preserve muscle mass and improve recovery outcomes. Exercise and rehabilitation further enhance these benefits by synergistically promoting muscle protein synthesis and function. Moreover, emerging technologies\u2014including artificial intelligence\u2013assisted nutritional monitoring, nutrigenomics, and biomarker-based personalization\u2014represent promising directions for individualized care. Sarcopenia in gastric cancer is a modifiable and clinically significant condition. Integrating personalized nutrition with structured rehabilitation can markedly enhance functional recovery, treatment tolerance, and quality of life. Future research should aim to develop precision-based nutritional algorithms and standardized diagnostic frameworks to optimize outcomes in this high-risk population.<\/jats:p>","DOI":"10.4082\/kjfm.25.0215","type":"journal-article","created":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T04:51:59Z","timestamp":1773982319000},"page":"97-108","update-policy":"https:\/\/doi.org\/10.4082\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Nutritional pathways from treatment to management of sarcopenia in patients with gastric cancer: a narrative 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