i myself drink two bowls of stone a day (start out with one cup recycled root to four cups water, kneaded for twenty mins) and this is pounded down in about 2 hours max. then a fresh bowl with pristine untouched root, same ratios/squeezin time. this is finished within three to four hours. i feel the same shit duder. fucking beat. with a blank mind. like nothing comes. period. yet if i try to write or come up with shit, its there waiting and ready. it just puts me into a meditative mindset, for lack of better terms. then come the next day: awww fuck....exhausted. i have to ingest all sortsa guarana and yerba mate thruout the day to not black out at random old man style. and still im tired even thru all the xanthines. but yet when i begin kava sessions later on, i wake right the fuck up. i know nothing about damage, but can relate. i think thats just the nature of the beast. and also i think maybe strain will play a big part. what are you drinkin on, if you dont mind me askin?