Sweet lots of good info, thanks! I've been doing to the Yogi tea for a few years now so no worries about reverse tolerance.
Now I am jonesin' to get home and make a batch. I do have the concentrate and kava candy at work....hmm. Three of my coworkers tried the concentrate and they both ordered some so it was a hit. I prefer the root better though as the concentrate is so strong it isn't as enjoyable as a few shells of root. The kava kandy is better for a stressful day at work, just strong enough to take the edge off.