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Abstract The incidence of malnutrition in tumor patients is high. As a first-line treatment nutritional therapy is very necessary
for tumor patients which should be run through the whole treatment cycle. Oral nutritional supplements as one of the important means
of enteral nutrition in artificial nutrition is widely used in clinical practice with still many details of clinical use unclear. Based on the
2018 and later-on ESPEN ASPEN and CSPEN nutrition guidelines this paper searches the pubmed CAJD and Wanfang data from
January 1st 2017 to October 31st 2022 for randomized controlled clinical trials expert consensus Meta - analysis and
systematic. The search free words are " oral nutrition supplement" " nutrition treatment" " nutrition intervention" " enteral nutrition
treatment" and "formula food for special medical purposes". The authors carried out literature reading according to the search results
and expanded the search to the references. This paper updated the detailed evidence reporting patients with different tumor pathological
types who can benefit from the use of ONS especially the method the dosage of ONS as well as the appropriate formula for different
tumor and additional immune enhancing nutrients. The authors used GRADE method to evaluate the evidence so as to provide a
theoretical basis for further clinical practice for oral nutritional supplements.
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Received: 20 August 2022
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