been searching for the difference between yellow topps and blue tops and which one is stronger and seems like it depends on the supplier. the caps could be any color and they're all still generic hgh, correct? a buddy of mine used 2iu's ed for 5 on 2 off of jintropin for 6 months. i used blue tops at 4iu's ed 5 on 2 off for 3.5 months cuz the money was a problem and i didnt continue with the hgh. He also used it with another aas and i just ran hgh by itself. my question is, would 2iu's of hgh for atleast 6 months give good results. hgh is pricey and why run 4iu's if you could run 2iu's? any input?