L-Arginine is a non-essential amino acid which becomes essential with stress, injury or starvation, pregnancy & protein deficiency. Arginine is found in meat, nuts, eggs, milk, & cheese. Very little is found in grains, vegetables or fruits.

L-Arginine's most important benefits including: stimulates production of insulin, increases growth hormone production, stimulates the thymus (immune controlling) gland - when combined with Lysine, enhances immune function - improve total T-cell numbers & activity, detoxifies ammonia in your body, ameliorate the toxic effects of gut/digestive malfunction, is involved in sperm production, in diabetics 1000 mg twice daily significantly reduced lipid peroxidation which would reduce the risk of cardiovascular disease & other complications of diabetes, helpful with alcoholism, helpful for hepatitis, and converts to nitrous oxide which gives more elasticity to arteries & may help some cases of high blood pressure.

Arginine is a conditionally essential amino acid with anabolic and immune system supportive effects. It is required for growth, immune function, wound healing and many aspects of protein metabolism. Arginine is necessary for the production of growth hormone. It is also a precursor for nitric oxide, a critical substance that helps regulate the function of cardiovascular, nervous and immune systems and which is essential for muscle growth.

Molecular formula: C6H14N4O2
Molecular weight: 174.20
CAS Registry Number: 74-79-3

L-Arginine research information

Whole Foods Market : Health Info - The amino acid arginine is acquiring a reputation for keeping the body's biggest muscle—the heart—in tip-top shape. In fact, this workhorse nutrient performs numerous vital functions, facilitating the healing of wounds and promoting the secretion of key hormones such as insulin and glucagon.
L-arginine metabolism - Interrelation between cyanophycin synthesis, L-arginine catabolism and photosynthesis in the cyanobacterium Synechocystis sp. PCC 6803 wild type and PsbO-free mutant.
Immunoregulatory Effects of L-Arginine and therapeutical implications - Information on some effects of L-arginine on immune cell functions, including triggering of L-arginine-nitric oxide and arginase pathways, its biological properties and therapeutical applications.
Arginine Monograph - Description, properties and actions of arginine with respect to pets.