L Carnitine vs L Arginine: Understanding Their Differences and Benefit Fitness Health Acetyl L Carnitine vs L Carnitine: 4 Key Differences Momentous 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 The effects of supplementation with L arginine on anthropometric indices and body composition in overweight or obese subjects: A systematic review and meta analysis ScienceDirect