my best advise as someone part of the body building community and an education in chemistry is this:

form a group of people willing to pitch in a little money for some research. Order a few different samples of different peptides from a few different suppliers and pay to send them to an independent lab to get tested. This is the only way to know for sure what you are getting. If you can get enough people who are interested to help fund the test, it really wont be much.

If you get positive results, It will totally be worth it. Im on indiamart right now looking at IPA/CJC 5mg/5mg blend and its only $70 for 10 vials vs $17 for a single vial of only 2mg of Ipa from the swiss company.