Lee looks All-Natural in that one! yeah, my guns come from genetics..
In fact Lee already had a world-beating physique before he got on the gear.
I'd say that bodybuilding in its pure form is genetics and hard training, enhanced by drugs of course.
Of course nowadays people think that being a top pro is just a matter of taking enough of the right drugs. But that's not true, as thousands of drugged-up wannabes in gyms around the world will attest.