Triple negative breast cancer (TNBC) is a devastating cancer disease characterized by its poor prognosis, distinct metastatic patterns, and aggressive biological behavior. Research indicates that the prevalence and presentation of TNBC varies among races, with Asian TNBC patients more commonly presenting with large invasive tumors, high node positivity, and high histologic grade. In this work, we applied ultra-high performance liquid chromatography-high resolution mass spectrometry (UHPLC-HRMS)based metabolomics to discover metabolic signatures in Asian female TNBC patients. Serum samples from 31 TNBC patients and 31 healthy controls (CN) were involved in this study. A total of 2860 metabolic features were detected in the serum samples. Among them, 77 metabolites, whose levels were significantly different between TNBC with CN, were confirmed. Using multivariate statistical analysis, literature mining, metabolic network and pathway analysis, we performed an in-depth study of the metabolic alterations in the Asian TNBC population. In addition, we discovered a panel of metabolic signatures that are highly correlated with the 5-year survival rate of the TNBC patients. this metabolomic study provides a better understanding of the metabolic details of tnBc in the Asian population. Among women, breast cancer (BC) is the most common type of cancer and also the 2 nd leading cause of death worldwide 1. BC can be divided into several major subtypes based on conventional immunohistochemistry detection of hormone receptors, including human estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth receptor-2 (HER2). As a highly heterogeneous disease, patients with BC have various morphological spectrum, clinical presentation, and prognostic outcomes 2. Among the various subtypes, triple negative breast cancer (TNBC) uniquely lacks expression of all three hormone receptors and accounts for 15-20% of the BC cases. TNBC has attracted more attention compared with other BC subtypes as it is typically associated with high aggression, poor prognosis and a high risk of disease relapse within 5 years following diagnosis 3. Women with TNBC have a high frequency of metastasis to the lung, liver and brain, and survival is generally poor. Another troubling feature associated with the disease is the disparity of presentation and survival compared with other ethnicities 4-9. It is thus of great demand to study the molecular basis of TNBC in order to guide the development of promising drugs and therapies for treatment. Metabolomics is an emerging technology for health science research, representing a more recent addition to the suite of "omics" tools. In particular, mass spectrometry (MS)-based metabolomic analysis enables the most comprehensive measurement of metabolites in a given biological system. It is thus a powerful analytical tool to identify metabolic biomarkers associated with disease or abnormal phenotypes for clinical applications 4. Since metabolites are the end products of gene regulatory processes and prote...