L-arginine

L-arginine is an amino acid that plays a crucial role in various physiological functions. It is a building block of proteins and a substrate for nitric oxide synthesis, a molecule that helps relax and widen blood vessels. While the body can produce L-arginine on its own, there are certain situations where it becomes conditionally essential. During periods of growth or medical conditions, the body's demand for L-arginine may exceed its endogenous production.