I don't know bro, I'll put this Bio hGH up against Seros anyday. A lot of experience with both and I swear I'm getting much better results from Bio's versus the Seros I ran for over a year, and at a fraction of the price of real pharma Seros. Seros is now the number 1 counterfeited hGH on the black market. The shit's out there with legit holos and serial numbers that clear the Seros verification app and website. I'm sticking with Bio's growth for as long as they're offering it!