well, the person i'm interested in trying some HGH from has blue tops, brown tops, hygetropin, and some other one called "peculiarity purity 98-99%". now, i know several companies make the blue and brown tops, so i know with those two nobody could tell me how good this guys is. however, is hygetropin made by more than one company or is it just one? the blue tops are the cheapest of all he has, but i just want to make sure i get whatever is the most potent.