Artisanal kava, lol.
In my humble opinion, ANYONE selling kava either at a kava bar or online should be getting their root tested and approved by T.K. Group Labs for nobility. I do occasionally get kava that doesn't have the TK seal on it, but I don't feel 100% about it when I do. I would feel much better about the state of things if every vendor were getting vetted nobility tests done.
And, no offense Deleted User, but it doesn't have to only be T.K. Labs, if there are others who also do the same thing. However I'm not aware of anyone else who does the same tests or to the same level of scientific rigor. Right now, TK is the creme de la creme. If it has the seal, I feel good about it.