I have a discussion here with the main basic ways: Tips for buying hCG Injections Online
In a nutshell, The most sure way to know: The easiest & most reliable way to know your hCG is real is to purchase it from one of the main U.S. hCG online clinics- because they will send you an hCG vial that has the actual pharmacy information it was produced in right on the label – it typically shows the name of the pharmacy, the address, and sometimes the phone number – you can easily look it up and see that it’s a legit U.S. compounding pharmacy.
While some test hCG with pregnancy tests, and I used to recommend this, I no longer do and I explain in detail why here:
Why I don’t recommend using pregnancy tests to test your hCG
