Oh ya man i am on your same page. I use igf-1 lr3 or igf-1 des and i get the shits. Its due to an increase in igf or hgh (i dont recall exactly which one causes it) But it causes a flush in the body. You can look up hgh release or igf and bowel movements on google and alot of medical sites have it as a side effect, it might subside, it might not.
I usually get mine about 1 hour after injection PWO. My body goes nuts after the injection for carb intake and then it flushes itself haha.