Hi there,
191 or 192, the 192 aa sequence can cause alergic reactions and anybodies only in low percent of men. And it will lasts as long as you use it, after that antybodies, will no longer be present when you stop using it ,because there is no longer 192 aa in the body. So all you people that are thinking that you can f... your own GH for rest of your life are in big mistake.
When you stop using 192 aa HGH ,your body will not attack your own GH because there is no 192 aa anymore, there is only your 191 aa GH and the body is recognize it as something normal,so it doesnt give you antybodies or some tipe of reactions.