'The distinction between essential and non-essential amino acids is somewhat unclear, as some amino acids can be produced from others.'¹ Nine amino acids are considered essential, however arginine is not among them. Decreased levels of arginine are linked to reduced production of sperm and L-arginine supplements are marketed to provide balance to such a deficiency.²

Essential amino acid requirements can be derived from meat proteins and plant proteins in combination easily, however vegetarian diets can provide complete amino acid requirements without any meat. Dietary sources of arginine in meat includes: dairy products, meat, game, and seafood. Dietary sources of arginine in plants includes: nuts, wheat, seeds, and soybeans. Note that whole foods are a more reliable source, e.g. arginine is included in the wheat germ which is absent from white flour.

Arginine is essential in the process of synthesizing creatine in the body. Additionally, arginine is significant in the production of Human Growth Hormone (HGH); Arginine is involved in several biological functions such as healing, removal of ammonia, and functioning of the immune system. There is evidence it may be linked to longevity through these processes. This amino acid is sometimes also promoted as part of treatment for erectile dysfunction and an agent in the release of hormones. It is important to consult a physician in determining whether the use of arginine supplements could be beneficial to the individual. L-arginine and sales of other dietary supplements.

arginine n.
A bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa³.