In addition, the antioxidant capacity, obtained by the FRAP assay, allowed us to distinguish HER2+ BC samples from the others (AUC from HER2+ vs. HER2− = 0.81; AUC from HER2+ vs. BBD = 0.87), and correlated with the wavenumbers 3874 cm−1 (r = 0.829; p = 0.042), 3876 cm−1 (r = 0.829; p = 0.042) and 3878 cm−1 (r = 0.829; p = 0.042). This evidence concerns the gene ERBB2 and breast cancer.