L-Arginine may be helpful in enhancing the immune system. This amino acid may increase the size and activity of the thymus gland, which is responsible for manufacturing T lymphocytes – the much talked about T-cells, which assist the immune system.

In the pancreas L-Arginine is used to release insulin and in the pituitary gland it is a part of human growth hormone.

L-Arginine plays a role in cardiovascular health.

This amino acid makes up 80% of sperm and may be helpful for infertility.