Argininosuccinic acid disodium, involved in the urea cycle's fourth step, is cleaved by argininosuccinate lyase (ASL) into arginine and fumarate. It diminishes reduced glutathione (GSH) levels and elevates reactive oxygen species in the cerebral cortex and striatum, leading to lipid peroxidation, protein oxidation, and oxidative stress in the developing rat brain [1] [2].