100% Beef Aminos is a high potency blend of superior beef amino acids derived from the highest quality beef protein isolate, been albumin concentrate and Argentine beef liver. 100% Beef Aminos contains a full spectrum of highly concentrated amino acids as well as many other necessary and essential nutrients, harnessing the anabolic potential of beef, ideal support for your muscle building endeavors. Each two tablet serving provides a diverse source of amino acids and when taken prior to each mean, it becomes ideal for increasing overall amino intake throughout the day. 100% Pure Beef Protein Isolate. Beef Albumin. Argentine Beef Liver.