Ya Dong is a herb infused spirit, reputed to have many medicinal qualities. If you ask a Thai person what's in Ya Dong, they will tell you all sorts of strange stories of lizard penis' and narcotic herbs. The truth is rather more boring, there is no set ingredients for Ya Dong, each person makes their own blend and it's usually nothing more than regular herbs like ginseng, plaonoi, tree bark and vodka or whiskey.
I'm not sure what's in my jar (above), it has been handed down between my friends, and I just top it up with vodka every month or so. I drink it with lime to kill the flavours a little. I'll try to find out what the herbs are and update this blog entry. (Anyone?)