The first bitter I tried was Jiaogulan. I happened to have the capsules on hand, but later when I bought the liquid bitters, and I've tried several different kinds, they had no effect on me and they didn't even taste bitter compared to the Jiaogulan. So it was just a waste of money. I now just stick with the Jiaogulan. My husband says the powder tastes like he is licking an ash tray.
I don't use much of the powder so cost wise it doesn't seem too bad. One capsule can last up to a week.
Just thought I'd mention my experience as another option.