I think Roaddog and other are right also by saying when you drink kava right before bed the hangover is much worse. I wrote about the sediment but if I'm being honest I experience hangovers too and need to keep it in check. Chris's kavas from GHK have been kind to me but anything over 6 tbsp is usually not the best idea. Papa Ele Ele has been one of my favorites because it is strong, you can use less, and there are no side effects -- but that has been out of stock for a while. Honokane Iki, Mahakea, and Nene micronized seem to have helped me as well. Maybe we can help each other out and suggest kavas which are better for hangover people. I'll try a bunch of new GHK ones in the next few weeks.