The amino acid L-Ornithine stimulates and regenerates the immune system, especially the Thymus gland. An adequate supply of this amino acid is especially crucial for anyone with an immune deficiency due to any cause. In addition, you need L-Ornithine for fat metabolism, since it stimulates the release of growth hormone, which helps you metabolize excess body fat and manage your weight. And you need it for stabilizing sugar metabolism, since L-Ornithine stimulates insulin secretion and enhances liver function by detoxifying ammonia from the liver.