In prostate cancer, elevated sarcosine is associated with metastasis while downregulation of the hexosamine biosynthesis pathway (HBP) is associated with castration-resistance. In clear cell renal cell carcinoma (ccRCC), elevated glutathione (GSH), dipeptide metabolites, and metabolites from the 1-carbon/folate pathway are associated with metastasis while α-hydroxybutyrate is associated with disease recurrence. Decreased levels of lipids and citrate are observed as lower-grade tumors progress to high-grade ccRCC. In melanoma, trimethyllysine, dimethylarginine, and induction of the 1-carbon/folate pathway are associated with metastasis, while elevated ROS is associated with inhibition of metastasis.