I thought it was already pretty well known that bioavailability is IV>IM>SubQ? That goes for GH as well. It is interesting however that the obese women had less bioavailabilty though, but not all that surprising either.
Do you inject your GH IM?
I'm pretty sure GH has better bioavailability SQ than IM. At least that's what several GH manufacturers data says. Slightly better.