Well you do see liver herbs in health stores as far as I know they
are sold generally for skin and bowel problems though rather than the liver
What I do though is to buy loose herbs and make up my own fairly simple
decoctions. Barberry bark is a favourite of mine. I avoid herbs that are harsh
such as rhubarb rt and senna. You can over do bitter herbs though I think and they can be weakening and some can be quite harmful to the liver so best to stick with gentle ones I feel. I dont use them a lot though as they can taste pretty awful