Yes, believe me kbrkbr, Jintropin is authentic 191aa, they have a legit patent on the process in china, they are they ONLY company that can make it legally. If anyone else is making 191aa I'd love to see it. And yes, I've seen lab tests by clients of mine and mods on other boards that I trust showing that Jintropin was 191aa, I do not usually say something as fact if it is only my opinion. I trust these people and those several reports.... jintropin is 191aa, all others, by default, must be generic 192aa, as they cannot legally be made at all otherwise. Does this mean your generics aren't 191? No, they could be made illegally i'm sure and still be real... but more likely they are just 192aa made legally, it's an older, cheaper version but it still works well in many people. If yours works and you like it, who really cares if it's 191 or 192? I'm just not willing to risk that much money on something that's not a sure bet to be 191aa!