Years ago I found myself feeling wiped out after a few days drinking kava in a row. We know that kava causes more urination and possibly more sweating. I made the connection between the fatigue/lethargy, the increased water loss and b vitamins. After supplementing with b vitamins I noticed a lot less fatigue. I've written recently about having boy's trouble downstairs, less "get up and go". So I've read today that zinc is excreted through water loss channels as well. Low zinc is known to be linked to lower testosterone. So I'm going to start supplementing with zinc and see what happens as despite taking a lot of other supplements I do feel at a low ebb sometimes still. I wonder how many other nutrients are lost due to increased urination from kava?