Each "GP Phenyl 100" milliliter contains 100mg of Nandrolone Phenylpropionate. GP Phenyl 100 is available in a 10ml multi dose vial. GP Phenyl 100 is an anabolic substance. This substance is particularly impressive since under it’s use, the effected proteins can be stored in large amounts directly in the muscle cells. In addition the product assists protein synthesis. Those features greatly help preserve the muscle mass during low calorie diet periods, when accompanied with some mid-strength androgenic substances.