I find kava isn't very fart inducing even if it can build up gas in there, I'll usually burp getting it down but that's about it unless something else that had to come out was already in there. Plus is it true when kava is made for a lot of people and drank socially it's more watered down and a lot more is drank throughout the night? That would explain a lot too. Maybe I get too relaxed to fart much? I don't know but it certainly doesn't make anything smell either but then again my diet is pretty plain too.