L Arginine and L carnitine , Arginine is an amino acid which we can also produce naturally . This increases your notice oxide production , human growth hormone and improves circulation. , These three L Carnitine vs L Arginine: Understanding Their Differences and Benefit Fitness Health The Renal Safety of L Carnitine, L Arginine, and Glutamine in Athletes and Bodybuilders ScienceDirect Amino Acids Complex Energy & Active Support Zipvit