most of them take test propionate during the preparation. besdie that they do have other stuffs like primo tabs, stano and anavar tabs, these drugs only last them for 3 weeks beside that they also do take T3. lassix and clen. that why they are rips and never get caught. For those who are too flat, they will take testo suspension, which will last only 3 - 4 days in thier systems. they will nto take too such as it hold water. there for small amount will not make them water retension giving them gyno, so anti estrogen is not requiry. GH and IGF also play a parts.