Prescription peptides versus Research lab

I really want to start GHKCU I am wondering if I should use the one that I ordered from a Research lab or I should just spend the money and get a prescription from a Medi spa. Obviously it’s five times more per vial . Is there a great difference in quality? We are due the Medi Spa’s get the peptides from.? I wish I knew of a Research lab that had all of their has all of their peptides t tested by janoshik. I want to make sure my Research is safe.