i used this stuff 1.5 yrs ago .started off on it actually.crazy dreams right away,numb hands ,deep sleep all the reg sides and kept me pretty lean as i put on some size.got some bw done after pinning 3ius and igf1 was low 400s (130-330).was low 200s before i started.so i knew it was at least legit and kept using it wit some good success....but after i ran out a cpl mos ago i decideed to buy some more.well when it came it looked differnent.like when i had 1st had it the powder all stayed at the bottom of the vial and when i reconstiutued it thr waas flakes etc.but this 2nd batch was in the form of the pucks that slide up and dwn like ive seen in serostim vials.and the tops just pulled off differnetly too (prob no biiggie anyways).so i decided to get some bw done and someone said to try to pin 10 ius and see what happens.so i pinned 10 ius and it came bak igf1 377 (130-330).so it came to the conclusion that this batch was def undrdosed.i was expectin gmuch higher 3s after 10 ius.so now ive made the switch to norvotop and feel better already.i only have 2 boxes and after this its only serostim for me!