I have used a lot of MK-677 over the years, from a lot of different labs. The hunger pains is what lets me know it's real. I've taken 40-50mg from one place and got nothing, and 20mg from another place and felt like I was starving. Ghrelin is the pathways in which is works.. so it should make you hungry. You may not get hunger pains, but you should feel like eating more. Like said before, not everyone experiences the same thing from the same drug.. but MK-677's mechanism of action is through making you hungry... so, you do the math on that.