I've been through a lot of this stuff, I've also binged pretty hard on it, this 11 year is the most addictive kava I've had, I love it, I end up drinking it all day sometimes, that being said, I get dermopathy very easy, before this new bag I have, I had pretty bad dermo from Tongan strain, and just dipped right into the 11 yr without a break, few days later, Dermo mostly gone, never get it from this kava, however, I get something almost more sinister every time I go through a half pound in four days, my eyes get completely f´d. You have to try hard to build it up in your system to get this, and also not stop at first warning signs, eyes start getting itchy and dry, pretty soon weird deep creases form under your eyes and they start burning, than your constantly tearing, like tears are coming out of your eyes, and its glaringly obvious to anyone who looks at you, and not the only time this happened to me was when I was going through an extremely hard time and really needed the kava, if you keep your kava consumption only to evenings this would never happen, no matter how much you have, just don't drink it all day and almost zero side effects.