[Johanx64]

> Just one more rep

It don't work like that.

The amount you can work out (at intensity) is limited by your recovery time.

Thus you take that "supplement" and can do one more rep, or go to gym extra time a week, especially if it comes to "regulated and risky" supplements, then you can do many, many more reps.

[chank]

The point is, supplements will mostly only help you shore up deficiencies in your diet and generally won't do it as effectively as eating right. No matter how much supplementation you do, you can't out-run a bad diet.