e problem with synthetic Mechano gh (MGF) is that it is introduced intramuscularly and is water based so it goes into the blood stream. When used this way, Mechano gh (MGF) only remains stable in the blood stream for a few minutes. Biologically produced MGF is made locally and does not enter the bloodstream. It is also short acting so stability is not an issue. By PEGylating the Mechano gh (MGF) it is almost as efficient as local produced Mechano gh (MGF) when used intramuscularly. This is accom