When you're natural your body can only build about .5-2lbs of dry muscle tissue per month. That discourages people from eating like pigs because your body can only use just so many of those calories to build and the rest will just be stored as fat. But the problem with gear, let's talk only injectables, is that I never hear anybody discuss how much muscle you can humanly build while "on", at the very least some rough estimates. That's why so many people just gorge themselves and eat until they can't eat anymore and they end up with half of their total gains being fat. They ended up putting on all the muscle they could, but obviously they ate way too much because their body was able to store so many excess calories as fat. Theoretically they could have gained just as much muscle and hardly any of the fat if they had just ate only the amount of calories needed to build muscle.
When you're natural, since your body can only build .5-2lbs of muscle a month, you only have to give it an extra 300-500 calories a day to use as building blocks. If you're on, obviously your body will be able to build a lot more muscle than .5-2lbs a month, but just how much ? You really need to know that number in order to give a decent estimation of how many extra calories you should give it. You don't want to be too conservative and take away some possible gains, but you also don't want to be too liberal and end up putting on a bunch of unnecessary fat which will inevitably lead to some muscle loss when you trying cutting down the fat.
Are there no scientific studies or things of that sort on this subject ?