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Review  \nJoan Ern Xin Tan 1, Mattias Wei Ren Kon 1, Charmaine Su Min Tan 1, Kevin Xiang Zhou 2, Kewin Tien Ho Siah 1,3, Serene Si Ning Goh 1,4,5, *,† and Qin Xiang Ng 4, *,†  \nAcademic Editor: Mariusz Chabowski  \nReceived: 19 November 2025  \nRevised: 10 December 2025  \nAccepted: 18 December 2025  \nPublished: 21 December 2025  \nCopyright: © 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.  \n1 NUS Yong Loo Lin School of Medicine, National University of Singapore, 10 Medical Dr, Singapore 117597, Singapore; [mattias.kon@u.nus.edu](mattias.kon@u.nus.edu) (M.W.R.K.)  \n2 Faculty of Medicine & Health Sciences, McGill University, Montreal, QC H3G 2M1, Canada  \n3 Division of Gastroenterology & Hepatology, University Medicine Cluster, National University Hospital, Kent Ridge, Singapore 119077, Singapore  \n4 Saw Swee Hock School of Public Health, National University of Singapore, 12 Science Drive 2, \\#10-01, Singapore 117549, Singapore  \n5 Department of General Surgery, National University Hospital Singapore, Kent Ridge, Singapore 119077, Singapore  \n* Correspondence: [serene_sn_goh@nuhs.edu.sg](serene_sn_goh@nuhs.edu.sg) (S.S.N.G.); [ng.qin.xiang@u.nus.edu](ng.qin.xiang@u.nus.edu) (Q.X.N.)† These authors contributed equally to this work.  \nAbstract  \nBackground/Objectives: Breast cancer is the most common malignancy among women globally, with survival rates improving due to earlier detection and better treatment. As a result, cancer survivors now constitute a growing segment of the population, and addressing their long-term health and well-being is a public health priority. Diet and nutrition represent modifiable factors that may influence recurrence, comorbidities, and quality of life (QoL), yet clear evidence-based guidance remains limited. This umbrella review thus synthesized evidence from published reviews on the effects of dietary and nutrition interventions among breast cancer survivors. Methods: Following a prospectively registered protocol in PROSPERO (CRD420251185022), six databases (PubMed, EMBASE, Scopus, Cochrane Library, PsycINFO and CINAHL) were systematically searched for systematic reviews/meta-analyses evaluating dietary or nutrition interventions in adult breast cancer survivors. Eligible reviews reported anthropometric, metabolic, psychosocial, or survival outcomes. Methodological quality was appraised using the AMSTAR-2 tool, and findings were narratively synthesized. Results: Nine systematic reviews encompassing more than 10,000 breast cancer survivors were included. Interventions ranged from general dietary counselling and structured weight-management programmes to Mediterranean-style dietary patterns, dietitian-led primary care, multiple health behaviour change interventions, mobile nutrition apps, and broader lifestyle programmes incorporating diet. Across reviews, interventions consistently improved diet quality and fruit–vegetable intake, produced modest but meaningful reductions in weight, body mass index, and body fat, and enhanced several QoL domains (e.g., fatigue, physical functioning, body image) . Higher adherence to Mediterranean-style diets was associated with lower all-cause and non–breast cancer mortality, though certainty was limited by observational designs. However, evidence for long-term maintenance, survival endpoints, and ethnically diverse or low-and middle-income populations remains sparse. Conclusions: Dietary and nutrition interventions, particularly structured, dietitian-supported, and Mediterranean-style approaches, contribute to improved diet quality, sustainable weight control, and enhanced QoL among breast cancer survivors. Integrating nutrition care into survivorship pathways should bethe focus of future research.  \nKeywords: breast cancer; survivor","cbCaif7vzz9Gbmy8","https://ap.wps.com/l/cbCaif7vzz9Gbmy8","pdf",597514,14,"English","# Abstract\n## Background/Objectives\n## Methods\n## Results\n## Conclusions\n# Introduction\n## Epidemiology and survival gains\n## Need for survivorship-focused dietary guidance\n## Challenges during transition to survivorship","[{\"question\":\"What was the purpose of this umbrella review?\",\"answer\":\"To synthesize evidence from published reviews on dietary and nutrition interventions among breast cancer survivors and clarify their effects on relevant outcomes.\"},{\"question\":\"How were the included studies identified and evaluated?\",\"answer\":\"The review followed a prospectively registered PROSPERO protocol and searched six databases for systematic reviews/meta-analyses, then assessed methodological quality using AMSTAR-2 and used narrative synthesis.\"},{\"question\":\"What outcomes did the review find improved by dietary interventions?\",\"answer\":\"Across reviews, interventions consistently improved diet quality and fruit–vegetable intake, produced modest reductions in weight and body fat, and enhanced several QoL domains such as fatigue and physical functioning.\"}]","Dietary and Nutrition Interventions for Breast Cancer Survivors - An Umbrella Review | PDF",1790772887,35]