Appendix A.

List of Search Terms.

Concepts	Search terms
Prebiotics and probiotics	Prebiotic* [Title/Abstract] OR prebiotics [MeSH Terms] OR probiotic* [Title/Abstract] OR probiotics [MeSH Terms] OR “psychobiotic*” [Title/Abstract] OR “gut microbiome” [Title/Abstract] OR gastrointestinal microbiome [MeSH Terms] OR “gut microbiota” [Title/Abstract] OR “fermented food*” [Title/Abstract] OR “fermented foods and beverages” [MeSH Terms] OR Yogurt [Title/Abstract; MeSH Terms] OR yoghurt [Title/Abstract] OR kefir [Title/Abstract; MeSH Terms] OR dysbiosis [Title/Abstract; MeSH Terms] OR kimchi [Title/Abstract] OR kombucha [Title/Abstract]; “kombucha tea” [MeSH Terms] OR sauerkraut [Title/Abstract] OR miso [Title/Abtract] OR “soy foods” [MeSH Terms] OR bifidobacterium [MeSH Terms] OR “Bifidobacterium animalis” [Title/Abstract] OR “Bifidobacterium longum” [Title/Abstract] OR “bifidus regularis” [Title/Abstract] OR Bifantis [Title/Abstract] OR “lactobacillus rhamnosus” [MeSH Terms] OR lactobacillus [MeSH Terms] OR “aacharomyces boulardii” [Title/Abstract] OR Saccharomyces [MeSH Terms] OR Streptococcus [MeSH Terms] OR Enterococcus [MeSH Terms] OR Escherichia [MeSH Terms] OR Bacillus [MeSH Terms] OR “Lactobaccilus helveticus” [MeSH Terms] OR “Lactobacillus casei” [MeSH Terms] OR “Lactobacillus plantarum” [MeSH Terms] OR “Lactobacillus acidophilus” [MeSH Terms] OR “Lactobacillus delbrueckii” [MeSH Terms] OR “Bifidobacterium breve” [MeSH Terms] OR “Bifidobacterium longum subspecies infantis” [MeSH terms] OR “Streptococcus salivarius” [MeSH terms] OR “Lactobacillus gasseri” [MeSH Terms]
Cancer	neoplasms[MeSH Terms] OR “cancer survivor*” [Title/Abstract] OR “cancer survivors”[MeSH Terms] OR neoplasm* [Title/Abstract] OR cancer [Title/Abstract] OR carcinoma [Title/Abstract; MeSH Terms] OR tumor* [Title/Abstract] OR tumour* [Title/Abstract] OR oncology [Title/Abstract] OR “medical oncology” [MeSH Terms] OR malignancy [Title/Abstract] OR malignant [Title/Abstract] OR chemotherapy [Title/Abstract] OR “drug therapy” [MeSH Terms] OR “antineoplastic combined chemotherapy protocols” [MeSH Terms] OR metastasis [Title/Abstract] OR neoplasm metastasis [MeSH Terms] OR metastases [Title/Abstract] OR radiotherapy [Title/Abstract; MeSH Terms] OR radiation [Title/Abstract; MeSH Terms] OR “irradiation” [Title/Abstract]) OR “gastrointestinal cancer*” [Title/Absract] OR “gastrointestinal carcinoma” [Title/Abstract] OR “gastrointestinal neoplasm*” [Title/Abstract] OR “gastrointestinal tumor*” [Title/Abstract] OR “gastrointestinal tumour*” [Title/Abstract] OR “gastrointestinal neoplasms” [MeSH Terms] OR “gastrointestinal stromal tumors” [MeSH terms]
Clinical studies	Clinical Trial [Publication Type] OR trial* [Title/Abstract] OR feasibil* [Title/Abstract] OR pilot [Title/Abstract] OR random* [Title/Abstract] OR experiment* [Title/Abstract] OR intervention [Title/Abstract] OR program* [Title/Abstract] OR group* [Title/Abstract] OR arm [Title/Abstract] OR single-arm [Title/Abstract] OR single-group [Title/Abstract] OR control* [Title/Abstract] OR comparison [Title/Abstract] OR clinical [Title/Abstract]
Psychosocial health	QOL [Title/Abstract] OR “quality of life” [Mesh terms] OR “quality of life” [Title/Abstract] OR “well-being” [Title/Abstract; MeSH terms] OR “activities of daily living” [Title/Abstract; MeSH Terms] OR “social conditions” [MeSH terms] OR “social condition*” [Title/Abstract] OR “psychosocial well-being” [Title/Abstract] OR stress [Title/Abstract] OR psychology, social [MeSH Terms] OR rejection, psychology [MeSH terms] OR “psychological adaptation” [Title/Abstract] OR psychology, behavioral [Title/Abstract] OR “social psychology” [Title/Abstract] OR “psychological distress” [Title/Abstract; MeSH Terms] OR “emotional adjustment” [Title/Abstract; MeSH terms] OR isolation [Title/Abstract] OR “mental health” [Title/Abstract; MeSH Terms] OR emotion* [Title/Abstract] OR emotions [MeSH terms] OR “emotional adjustment” [Title/Abstract] OR “holistic nursing” [MeSH terms] OR anxiety [Title/Abstract; MeSH Terms] OR “social support” [Title/Abstract; MeSH terms] OR anger [Title/Abstract] OR mood [Title/Abstract] OR social [Title/Abstract] OR “social stigma” [Title/Abstract] OR “social factor” [MeSH terms] OR “social factor*” [Title/Abstract] OR distress [Title/Abstract] OR depression [Title/Abstract; MeSH terms] OR isolation [Title/Abstract] OR “fear of cancer recurrence” [Title/Abstract] OR fatigue [Title/Abstract; MeSH Terms] OR “mental fatigue” [Title/Abstract; MeSH Terms] OR hopelessness [Title/Abstract] OR immobility [Title/Abstract] OR “psychosocial factor*” [Abstract/Title] OR “functional assessment” [Title/Abstract] OR cognition [Title/Abstract; MeSH Terms] OR “cognition disorder*” [Title/Abstract] OR “cognition disorders” [MeSH Terms] OR “cognitive decline” [Title/Abstract] OR “cognitive dysfunction” [MeSH Terms] OR pain [Title/Abstract; MeSH Terms] OR “social functioning” [Title/Abstract] OR “social behaviour” [Title/Abstract] OR “social behavior” [Title/Abstract; MeSH terms] OR “emotional well-being” [Title/Abstract]
Gastrointestinal health	Nausea [Title/Abstract; MeSH Terms] OR nauseous [Title/Abstract] OR vomiting [Title/Abstract; MeSH Terms] OR constipat* [Title/Abstract] OR constipation [MeSH Terms] OR diarrhea [Title/Abstract; MeSH Terms] OR diarrhoea [Title/Abstract] OR pain [Title/Abstract; MeSH Terms] OR “stomach pain” [Title/Abstract] OR “abdominal pain” [Title/Abstract; MeSH terms] OR gas [Title/Abstract] OR bloating [Title/Abstract] OR IBS [Title/Abstract] OR “irritable bowel syndrome” [Title/Abstract; MeSH Terms]; cramps [Title/Abstract] OR “stomach cramps” [Title/Abstract] OR “acid reflux” [Title/Abstract] OR “gastroesophageal reflux” [MeSH Terms] OR heartburn [Title/Abstract; MeSH Terms] OR GERD [Title/Abstract] OR dyspepsia [Title/Abstract; MeSH Terms] OR indigestion [Title/Abstract]