Exo MGF futile?

From what I've learned, mgf exists in our muscle cells, however never travels elsewhere. Thus the cells have no receptors for it b/c there is no physiological reason to have receptors for something tha never travels from cell to cell. I think any type of minor result from it's use is due to it's affinity to bind to some IGF receptors, just not in the same way, yet still yeild a pump or ability to achieve increased reps.

Can someone prove me wrong, honestly I'd love to use it again if I knew it was worth it.
 
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