What is good for the liver? Milk Thistle? Standardized?

I've had an ongoing problem with my liver for ages. It's not hepatitis. I think it is related to my gall bladder. Anyway, Many years ago I got tremendous relief by taking liquid milk thistle with an eye dropper. I have tried tablets and capsules since then, but they don't seem to have a noticable effect. There is also "standardized" and "total herb" versions of it, and the makers of each say their's is superior. Milk thistle seems to be the only treatment to improve liver function and promote healing of the dead liver cells. I would appreciate some feedback.