DBarcelo - I've been thinking about what you said on the age issue. It definitely makes sense that he, being older, would see a higher proportional rise in GH. Using made up figures for example if his natural GH is 1.5iu and mine is say 3iu by adding a further injected 1.5iu he is doubling his GH whereas I am only increasing mine by a factor of 1.5. I agree.

However, and I'm not disagreeing with you here as you seem very knowledgeable on the subject, his resultant levels of GH would be 3iu, mine would be 4.5iu - is there not something to be said for this?