is a semi-essential amino acid involved in numerous areas of human
biochemistry, including ammonia detoxification, hormone secretion, and
immune modulation. Arginine is also well known as a precursor to nitric
oxide (NO), a key component of endothelial-derived relaxing factor, an
endogenous messenger molecule involved in a variety of
endothelium-dependent physiological effects in the cardiovascular
is required for the body to synthesize nitric oxide, which enables the
arterial system to retain its youthful elasticity. Nitric oxide also
helps to produce endothelial relaxation factor, which is needed by the
arterial system to expand and contract with each heartbeat. L-arginine
may also help stimulate the immune system.
or traumatic injury greatly increases the body’ s need for L-arginine,
a key building block to maintaining healthy tissue and bone.
L-ornithine may also be used for this purpose.
studies suggest a combination of arginine and ornithine appear to
stimulate growth hormone (GH) based on the increase in strength and
muscle mass that was produced while intensely working out. However,
studies suggest that low doses of L-arginine and/or L-ornithine are
unlikely to effect GH release. A minimum dose of L-arginine to promote
GH release is probably 250 mg/kg of body weight.