On dose: I get very good results on 2 iu for the long term so I dont see a need to go any higher on my cruises. On duration: most data suggests 2-3 day max snap-back of natural GH production to normal levels. However, just for good measure, I like to use Ipa/CJC as noted to kick my natural production back in for an extended period. I'm in it for the very long term and without data that shows very long term use doesnt inhibit natural production, I am playing it safe. Plus I see no downside from this approach body comp-wise.