Solaray - L-Arginine & L-Ornithine - 50 Capsules features closely related, nonessential amino acids with similar structure and function. L-Arginine becomes part of protein in the body. L-Ornithine is used to make the protein. True Selection Solaray takes pride in offering great new products ... see here what they are delivering fresh to health food stores! No other brand offers a wider selection of vitamins, minerals, herbs.