he benefits of taking supplemental L-arginine are myriad and well-documented in scientific literature. The most important role L-arginine plays in the healthy human body is as an immediate precursor (component) in the creation of Nitric Oxide, a chemical which is necessary to convert toxic Ammonia into Urea, which can then be safely excreted. The role of L-arginine is not limited to only the Urea Cycle, however, and the Nitric Oxide produced in this process also has several other beneficial effects on the body as a whole.

l-arginine

Source: Top 10 Foods High in Arginine