It also is very important to consider how it is being administered to the the body and at what times.. There is a huge difference in the effect it has on intestinal growth, and over all body growth if the injections are made subcutaneous, or intra muscular. The timing is another factor that plays into this as well, regarding when during a day it's administered, I would suggest doing some research on the topic there is some great articles backed by science... Those are the only ones I believe in - but even then, have to still take it with a grain of salt as the sources on the topic are kinda varied