L-Arginine

Arginine can be used to synthesize glucose and therefore to produce energy. Its function in the urea cycle is described in the section on ornithine.

Arginine participates in the build up of various enzymes (bio catalysts that control metabolism)

In the white blood cells and neurons (nerve cells) arginine is used to produce the tissue hormone NO. NO plays a role in regulating muscle tension in the blood vessels and can help lower blood pressure. In the white blood cells, NO is used as a chemical weapon, therefore important for immune defense.

Like ornithine, arginine increases the production and excretion of Human Growth Hormone (HGH) and is responsible for muscle build-up, decomposing fat and increased energy production.

Arginine is found in meat, milk, cheese and eggs as well as nuts and plants (pumpkin, algae). In very high dosages it may lead to nausea and diarrhea.

Like ornithine, arginine works to degrade ammonia in the liver. However unlike ornithine, arginine imparts energy and should be taken throughout the day, not at night.