I’ve used them both also, (Nutropin & Supra) and I give it a thumbs up. I’ve been on since December and I’d say I really started to notice it about 6 weeks ago. I started really leaning out around my midsection and I just had to punch a new hole in my favorite Hugo Boss leather belt. Of course there are many other factors involved here gentleman, i.e. diet, other gear, workout intensity. Like any rHGH it’s excellent stuff, but it’s not the holy grail. Just remember that and you won’t be disappointed. BTW. In my original post I stated I was planning to 1.5ml every two weeks. I changed that. I did one kit every two weeks.