This might go a little long but stay with me...
I was thinking about why we don't see the quality physiques in the NPC as we did 15 years ago. In addition, why do you have some guys that look the same their whole career and some guys that blow up.
Since I started working out, I've always been told was important to build a base before hitting the sauce. Reason being, you want to take your body as close as you can to it's natural genetic limit, then you will be to become even larger on the the sauce. I guess I can agree with that in that if you took two cloned humans and have one weight train for 5 years and the other natural for those five years then you use juice for two years after, who is going to be bigger and better? The clone that trained naturally or the clone that didn't train at all? The answer is obvious...
Next up is GH, IGF and insulin. Many bodybuilders from the 70s and even in the 80s didn't use any of these and were able to obtain incredible physiques. Yet you have people who have cycles 2 or 3 times that are talking the peptides, slin mega doses of test and everything else you can think. They might end up building a decent physique but they could have built a much better one had they stayed with a reasonable amount of juice and increased the food for a couple more years (I understand this is the "I want it right now American Culture")These are the guys that were able to make it to the pros but won't do anything because they really are tapped out in terms of size or their bodies are just tired because of the mega doses of everything. It goes to beg the question, how important is GH, IGF and Slin? Answer = very important. BUT if you can't win a local show without it, you probably won't fare too well in the pros. The guys that go on to be successful pros are guys that aren't just young but fresh (no homo). Fresh meaning they haven't used everything but the kitchen sink...This means they still have much room to grow and improve in the pro ranks to compete with the greats. example as of recently: Phil Heath and Kai Greene. It is alleged that Kai was natural when he turned pro winning the team universe and that phil used a very low amount around 750mg of test and some other stuff (ALLEGEDLY). Obviously everyone won't be able to respond the way Phil does or follow the path Kai took (assuming all this is true). But these guys that are hyper responders will always be at the top of the pack. When these guys start using in the amounts (and what they use ((GH, IGF and slin)) other guys are using you get the huge jumps in weight. Example (Ronnie and Kai).
Will bodybuilders ever take less drugs than a previous generation? Probably not until there is gene replacement therapy or something else that comes along. We are the more is better culture and unfortunatly bodybuilding is one of the best examples of this. Guys that look great naturally and look incredible using (by bodbuilders standards) "a little" will always be ahead of the pack. The guys megadosers will always be trying to catch up to make up for their bodybuilding genetic inferiority.
Obviously it's much more complicated then drugs and genetics.........LOL. No it's not

Bottom line...Save your money on the GH, IGF and Slin unless you look like you can step on a national stage.
*unless you're using the GH for the many other usefull reasons.