Figure 1 presents three sets of comparative analyses to explore metabolomic differences among BC subtypes. Figure 1A,D,G compare controls (CTR) with subtypes (Luminal A and Luminal B) associated with a favorable prognosis. Figure 1B,E,H contrast controls with subtypes associated with a poorer prognosis (HER2-enriched and basal-like). Finally, Figure 1C,F,I examine the metabolic differences among the BC subtypes. Figure 1A–C correspond to LC-QTOF-MS analyses, Figure 1D–F to GC-QTOF-MS analyses, and Figure 1G–I to amino acid profiling. Here, ERBB2 is linked to breast cancer.