  
In the body, the metabolism of l-arginine leads to the formation of nitric oxide. Arginine-derived nitric oxide is an important catalyst for healthy dilation of blood vessels, circulation, and blood flow. In a prospective, double blind trial, l-arginine supplementation supported healthy endothelial function in blood vessels of male volunteers. In other studies, l-arginine promoted healthy platelet function and enhanced exercise tolerance. Additional trials indicate that l-arginine may support healthy lipid metabolism and lipid peroxidation, enhancing its cardiovascular support properties. It has been suggested that arginine has immuno-stimulatory activity and may promote the utilization of nitric oxide by scavenger cells for defense mechanisms. Enhancement of immune messenger compounds has also been observed in several studies with l-arginine. In a study involving elderly individuals, l-arginine facilitated healthy tissue recovery, and supported immune health. In men with low urinary nitric oxide values, l-arginine may support healthy sexual function. Some but not all research involving l-arginine supplementation for sperm motility have produced positive results. Arginine plays a role in the synthesis of hormones such as insulin and growth hormone, and has demonstrated the potential to support glucose metabolism and growth hormone production respectively. Nitric oxide is also a mediator of neurotransmission in the brain, supporting memory under the circumstances of reduced intracellular arginine. Preliminary studies suggest that l-arginine may support bladder comfort and function in some individuals. Because of its effect on nitric oxide production, l-arginine is theoretically best avoided by individuals with migraines, depression, autoimmune disorders, and kidney or liver disease. Arginine is contra-indicated for individuals with the herpes virus.
l-Arginine is a safe, versatile amino acid precursor of nitric oxide associated with promoting cardiovascular health, immune support, sexual function, and memory.
Ingredients per vegetable capsule:L-Arginine HCl 750 mg
Suggested use:
2-6 capsules per day, in divided doses, between meals.ÂÂ
