With Kava, regarded by many as Nature's benzoes, it is important to get some proper quality actual root.
Also, there is a reverse tolerance factor for some, but not all, whereby it can take some people 2 to 3 weeks of daily use, initially, to breakthrough and experience the full effects, as the kavalactones build up in the system and the body and consciousness acclimate to the kava.
I never even bothered with cheapy amazon capsules myself, instead I discovered all the best kava vendors and products which ship to my country, and acquired them lol!