Arginine is one of the amino acids produced in the human body by the digestion, or hydrolysis of proteins. Arginine can also be produced synthetically. Because it is produced in the body, it is referred to as "nonessential," meaning that no food or supplements are necessary for humans to ingest. Arginine compounds can be used in treating people with liver dysfunction due to its role in promoting liver regeneration.
Arginine Benefits:improves immune response to bacteria, viruses, and tumor cells.promotes wound healing by repairing tissuesplays a crucial role in the regeneration of liverresponsible for release of growth hormonespromotes muscle growthimproves cardiovascular functioning
Arginine is used as a supplement in the treatment of:
heart patients with arterial heart diseaseas an intravenous supplement to patients with liver dysfunctionas a supplement for easing exercise-related pains due to the heart muscle not getting enough blood to circulate to the muscles in the calves.
Supplements that combine arginine with other amino acids, such as ornithine and lysine, are purported to assist in muscle-building exercises by minimizing body fat and maximizing muscle tone. Results vary among those who have taken these supplements. Arginine is also present in "multi" amino acids capsules that are taken as a dietary supplement.
Arginine Precautions:
Long-term effects of arginine use have not yet been determined. Consultation with a physician regarding individual needs is always advised. Individuals who attempt to treat their own heart ailments, or intend to guard against any potential difficulty, should seek advice of a physician. Arginine does not show any positive results in treatment of men with damaged valves or enlarged heart tissue.
Arginine has been suspected in the formation of cold sores. Some practitioners suggest that consuming foods high in arginine, such as nuts, grains, and chocolates, can promote cold sores. Reducing intake of foods high in arginine and increasing intake of lysine (another amino acid) can reduce or even eliminate the cold sore problem.
Arginine Side Effects:
As previously noted, the use of supplemental arginine should be monitored for use with specific problems. Overdose could result in unforeseen complications, while regular use might or might not help ease everyday problems, such as relaxation of muscles not due to the specific heart ailment of arterial disease. People who should not take arginine supplements are those predisposed to herpes outbreaks; cancer patients, due to possible increase in cell replication of cancerous cells; those with low blood pressure; and individuals with certain liver or kidney problems. Those taking blood thinners are advised to seek medical advice before taking the supplement. Pregnant women are also cautioned against taking the supplements due to the unknown affect it could have on both mother and child. 
