Now Foods L-Ornithine 500 mg 120 Veg Capsules Healthy Protein Metabolism* Ornithine is a non-essential amino acid that plays an important role in the urea cycle, working with arginine and citrulline to rid the body of ammonia, a byproduct of protein metabolism.* Because ornithine is converted to arginine, it can help maintain healthy arginine levels in the body.* Ornithine can also be converted to other amino acids, such as citrulline, proline, and glutamate, as well as creatine, an important source of muscle energy.* There may be natural color variations in this product. Instructions for Use: Consume 3 capsules per day with juice or water, on an empty stomach. Now Foods L-Ornithine 500 mg 120 Veg Capsules Healthy Protein Metabolism* Ornithine is a non-essential amino acid that plays a central role in the urea cycle, functioning along with arginine and citrulline to rid the body of ammonia, a byproduct of protein metabolism.* Because ornithine is converted into arginine, it can help to maintain healthy arginine levels in the body.* Ornithine can also be converted into other amino acids, such as citrulline, proline, and glutamate, as well as creatine, an important muscular energy source.* Natural color variation may occur in this product. Directions: Take 3 capsules daily with juice or water on an empty stomach. Store in a cool, dry place after opening. Supplements Facts Serving Size: 3 Capsules