There are NO PERMENENT GAINS--WITH, or WITHOUT steroids. Even naturally, the only way to keep your body from shrinking back down to its more "comfrotable" size (the demands of muscle are grand) is to CONSTANTLY shock it and keep it growing, with exercise and a constant supply of calories. Same goes for steroids. You want to keep your gains? THEN EAT and TRAIN for years. Whether you are on or off, you will progress. But gains will never stay unless you make them.