Ralco Show Back Slap 20#Back Slap 20# Muscle the Right Way Back Slap gives your project the ability to add mass, shape and movement all in one package. Must Have Product To: Support shape and definition Promote eye appeal Assist performance safely What's Inside: Ractopamine: Improves feed efficiency and increases lean gain. Purified Amino Acids: Building blocks for muscle growth to fuel Ractopamine response. Protein: Multiple high quality sources to support muscle mass