HGH and digestion

Hi guys
So I started some Chinese pharm grade HGH Ansomone at 2 ius per day, thing is it seems to have effected my stomach isn't working like normal, read somewhere the HGH slows down the thyroid which can cause this any idea what I should do or if you ever heard of this side effect, dose is pretty low not sure if 1iu would be any better?

Thanks