Not to be contrary here, but the most recent studies show just the opposite. IM injections were metabilized slower, not faster than SQ. But the serum concentrations were higher SQ, so that probably would still favor subcutaneous. I am trying IM injects of GH with slow insulins to see if better results can be noticed from the longer duration of the process. Still too soon for a opinion.
Also, IGF 1 through 5 must already be present for GH work in synergy. Now 17aa steroids do cause a release of insulin growth factors on the first pass through the liver and are recommended in a GH/insulin/steroid cycle. Exogenous GH, on the other hand, supresses IGF-1 release......one of our defense mechanisms to acromeglia.