Figure 4. Relative content of two potential phospholipids in each group. The relative content of two metabolites adduct [M+H]+ (upper in A, C) and [M+Na]+ (below in A, C) with the molecular weights of 496.3324 (A) and 518.3168 (C). The left curve plots show the relative content of m/z = 496.3324 and 518.3168 in each GC media sample (A and C), while the right curve plots showed the two metabolites in each FF sample (A and C). The signal intensity of the two metabolites UPLC peaks reflect the relative content of the m/z= 496.3324 (B) and 518.3168 (D) in each group. ** means P < 0.01.