Ornithine is synthesized from arginine and is a precursor of citrulline, proline and glutamic acid. L-Ornithine (from 644mg L-Ornithine HCl) 500 mg.
NOW Foods Arginine & Ornithine - Arginine & Ornithine - 250 vcaps
NOW Foods Arginine & Ornithine 500mg / 250mg 100 Vegetarian Capsules, Amino Acid
NOW Tri-Amino: Arginine, Ornithine, Lysine Capsules - 120 caps
Now Foods Arginine & Ornithine Amino Acids - 100 Veg Capsules
Life Extension, Arginine Ornithine Powder, 5.29 oz (150 g)