Man is that a can of worms been lots of research and have found 50/50 people believe they don't do anything a placebo affect and the other like the pump and see marginal gains. Igf1 many say they saw some gains, many say it didn't do anything. The ones so far I have read that may work would be igf1 in a 4 weeks cycle from 50-100mcg daily and then if your using hgh or not ghrp2 or 6 they are in the same family in conjunction with cjc 1295 with out dac apparently the dac make you retain water. Many discussions brew on this topic some guys that have tried every peptide possible say they haven't seen anything from them and say spend on some hgh. Others say they get a great pump and they have seen marginal gains, better gains with aa and with hgh.... That's my take on it so far. There are gurus and such blah blah but most is just bro science once and a while they throw in some science report make seem legit.