Alot of the times with herbs, there are secondary chemicals that balance the actives perse, idk if kava has any known ones. But most likely there is a higher ratio of secondary to active... so the more you add on and add on, the counteracting chemicals start to overway the active causing less of an effect... once again idk if this is the case for kava, but mitrigayne speciosa it is. There is a whole thread on that forum dedicated to "Less is more"... with kava if found this to be true sometimes... same with kr@ tho. It's all very peculiar, but if that's the effect your getting then try this experiment..... Take one, get effect... take another see if it adds or cancels out.... and keep going up. Rather than just taking 5 caps all at once ... Guage your effects and maybe you can find that 3 caps is the most effective and 4 and 5 start taking away... ... sorry if this is confusing ! Any questions I'll answer haha