L-Arginine is a conditionally essential amino acid. Our bodies are capable of synthesizing and making arginine. However, in certain conditions such as disease, trauma, or extreme stress, our bodies cannot produce sufficient quantities, making dietary sources of arginine essential. Arginine is naturally found in foods such as nuts, seeds, beans, fish, and chicken. For our vegan line, the used L-Arginine is natural identic lab made and derived from plant based sources. Arginine plays a number of roles in the body. It can be metabolized into glucose for energy during exercise and is important in the production of nitric oxide and creatine. Arginine is also known to stimulate growth hormone, a powerful anabolic hormone. In the body, the amino acid arginine changes into nitric oxide (NO). Nitric oxide is a powerful neurotransmitter that helps blood vessels relax and also improves circulation.