Manufacturer's Description: Arginine and Ornithine combines two essential amino acids into one optimal supplement. Arginine is necessary for urea metabolism, a process that prepares toxic ammonia for safe excretion by the kidneys. Ornithine is synthesized from Arginine and is a precursor of citruline, proline and glutamic acid. Both of these amino acids are popular with athletes and other active individuals. Supplement Facts Serving Size:2 capsules Servings per Container: 125 Ingredient Amount % Daily Value** L-Arginine 1g † L-Ornithine 500mg † ** Percent Daily Value is based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. † Daily Value not established. Ingredients: Other Ingredients: Gelatin (capsule) and Magnesium Stearate. Manufacturer's Directions: As a dietary supplement, take 2 capsules 2 or 3 times daily, preferably with juice or water on an empty stomach, before exercise or at bedtime.