Metabolites,as the end products of biochemical reactions within organisms,directly reflect the interplay of gene expression,protein function,and environmental factors,offering a comprehensive reflection of the organism's response to inherent genetic variations and external environmental changes.By systematically analyzing changes in human metabolite profiles,metabolomics aids in the identification of potential biomarkers,offering new insights for the early diagnosis,prevention,and personalized treatment of diseases.In recent years,research method-ologies in metabolomics have increasingly been applied to the etiological studies of liver cancer.This paper aims to review existing research reports to understand the application of metabolomics in the study of liver cancer etiology,with a focus on high-level evidence from prospective cohort studies and case-control studies nested within cohorts.By summarizing the current research evi-dence,the paper aims to advance the study of the etiological mechanisms of liver cancer,under-stand the pathogenic mechanisms of known risk factors,and offer a scientific foundation for the prediction of liver cancer.