Eengineering
GLP-1 Apprentice
Would follistatin344 produce some of the same effects? From what I recall it is a myostatin inhibitor and I have seen it offered from some vendors.Monoclonal antibodies are massively more difficult to produce than peptides or steroids.
It's not impossible - China produces plenty of monoclonal antibodies in general - but they're a lot more expensive and the production capacity is more limited in general. I wouldn't expect to see these in the grey market anytime soon