L-Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion as well as DNA synthesis.Studies have shown:Improved immune responses to bacteria.Viruses & tumor cells.Promotes wound healing and regeneration of the liver.Causes the release of growth hormones.Considered crucial for optimal muscle growth and tissue repair.L-Ornithine is an amino acid that has been used by fitness enthusiasts for years. L - Ornithine is a non-essential amino acid and is manufactured by the body. Since the body can produce ornithine, a deficiency of this non-essential amino acid is rare and it is abundant in protein foods such as meat, fish, dairy, and eggs.Ornithine is important since it: Induces the release of growth hormone in the body, which in turn helps with fat metabolism Required for a properly functioning immune system and liver. Assists in ammonia detoxification and liver Rejuvenation Helps healing and repairing skin and tissue and is found in both these body parts. Unsupported claims that ornithine promotes muscle building, but this has not been proven. Helpful for people recouping after surgery and athletes may benefit from this nutrient