Hope all is well brother.
I researched this item a few years back.
The problem is not isolating the peptide, the big issue is the carrier agent .
This pep needs a actual live virus or bacteria to be systematically dispersed, like an e-coli agent or something similar and that could potentially cost thousands of dollars for daily administration.
You would need daily doses to block myostatin and even if you could afford it there is no solid human data that suggests it would produce the huge amount of gains some companies claim.
At this point you would be wasting your cash.
God bless. Minister.