I've been a long time member of the bodybuilding committee and just wanted to pass on some knowledge to the youngsters of this board.
The absolutely number 1 essential component to becoming not only lean, but muscular, full, and hard bodybuilder is TRENBOLONE.
No other AAS can replace it, it is simply the best for developing the physique that is desired by pretty much everyone.
The acetate ester is the most effective, followed by tren-hex (parabolan) and then tren-enanthate.
When injected everyday tren-acetate(ace) will produce FAST changes, like we're talking days not months. Trenbolone is such a potent AAS that many will get excellent results at doses as low as 50mg EOD but the higher dose you go the better your results will be. Your typical bodybuilder with some decent experience can generally handle 100mg ED and this is the dose that will produce almost daily changes in an already lean physique. The more experienced you are the more you can run without getting too much negative side effects, doses of 300mg/day are not un-common among competitive bodybuilders.
Trenbolone without a doubt will increase your metabolic rate and burn fat, while at the same time producing an anabolic response in your body and cause you to gain muscle at the same time. The scale may stay the same but you will look bigger AND leaner each and every day you are on the hormone. Tren also will result in HUGE increases in strength even on a calorie deficit, for most guys they can lose 3-4% BF and add 50lbs to their 1RM's at the same time!
Of course with the good comes the bad, tren can have several sides such as insomnia, increased paranoia and aggression, night sweats as well as a post-injection cough. However compared to the amazing muscle building/retaining, strength, and fat loss properties of this compound the sides are almost negligible.
Once again, Trenbolone is the MOST important AAS in the arsenal of any bodybuilder and don't expect to step on stage and place anywhere near top without it in your blood.