Used as a potent inhibitor of nitric oxide synthase (NOS), this compound helps in studying the role of nitric oxide in various biological systems. It is widely applied in research to block the production of nitric oxide, allowing scientists to investigate signaling pathways, vascular tone regulation, and neurotransmission. Commonly used in cardiovascular and neuroscience research, it aids in understanding hypertension, inflammation, and neuronal activity. Due to its ability to cross cell membranes, it is effective in both in vitro and in vivo experimental models.