We compared the tumor metabolites between the TRAMP-HF and FABP4−/− TRAMP-HF mice, and found that nine essential and ten non-essential amino acids (excluding Cys) were 1.3–3.6-fold lower in the FABP4−/− TRAMP-HF group than in the TRAMP-HF group (Figure 6A,B and Table S2). The gene discussed is FABP4; the disease is hydrops fetalis.