Argi Power 1500 L-arginine HCl in capsules, food intended to meet the expenditure of intense muscular effort, especially for sports people. L-arginine HCl is essential amino acid, which is needed by body to sustain essential physiological processes. It enhances body's ability to use other food nutrients. Arginine as a nitric oxide precursor might increase endurance. Recommended use: 1-2 capsules daily before training or before physical activity. Warnings: Do not exceed the recommended daily dose. Do not use the product as a substitute for a varied diet.