Anthony Roberts wrote an excellent article on using T4 with GH, here are some clips:
“Although this analogy isn?t perfect, think of GH as a supercharger you have attached to your car?if you don?t provide enough fuel for it to burn at it?s increased output level, you aren?t going to derive the full effects.”
“So we want elevated T3 levels when we take GH, or we won?t be getting ANYWHERE NEAR the full anabolic effect of our injectable GH without enough T3. And now we know that not only do we need the additional T3, but we actually want the CONVERSION process of T4 into T3 to take place, because it?s the presence of those mediator enzymes that will allow the T3 to be synergistic with GH, instead of being inhibitory as is seen when T3 is simply added to a GH cycle. And remember, we don?t only want T3 levels high, but we want types 1 and 2 deiodinase to get us there- and when we take supplemental T3, that just doesn?t happen?all that happens is the type 3 deiodinase enzyme shows up and negates the beneficial effects of the T3 when we combine it with GH.”
So I would recommend low-dose T4 during all of the time you are on GH.[/quote]
I don’t agree with this. There is no need for it, and besides, just like steroids, low dose t4 is only going to replace what your body is producing, nothing more.