Back to the original topic:
Truth in advertising. If you claim it is noble, then let it be noble. If you test flavokawains, you could argue against an orange acetone test, but otherwise, you have to go with the current delimiting designation of tudei vs. noble. But as someone who used to do cancer research, but now does cancer therapy, flavokawains are not all bad. They do kill kill/inhibit cancer. Just to be safe, if you want the healthiest liver, drink Hawaiian cultivars and take no drugs, but if you suspect you may have cancer, and aren't on chemo, then use tudei +/- other non noble cultivars.
As I read over and over on this forum: each kava has its own purpose. Honestly, I had a lot of Chris' Mo'i today, and that stuff was made as an art. Boy was I annoyed when my daughter threw out a large mug of it. I almost yelled at her, but I thought, it's more important to keep a good relationship with her than to be mad about a few dollars worth of anything.