If it's real you will know. Real Jins are incredibly hard to get ahold of these days. There once was a time when I could order and have it shipped directly from the company in China, but after the big crackdown and fine, they won't even respond to my emails. Can't say that I can blame them!
I have tried many times to get my hands on real jins through various sources but every single kit I have gotten for the past 4 years or so has been fake.
If you want to know I would suggest getting blood work done to see if they are even HGH at all. If you want to know the protocol I use, just let me know.