I include a small amount of liver with my other meats. That is the only way I can eat it.
An Ayurvedic supplement for Liver issues is: Livomaphttp://www.ayurvedabay.com/search.html
This is very high quality. I have never ordered from this site before.
However why do you ask?
I was cooked vegan (including dairy) for 23 years and had no real health issues. However I did have chronic liver weakness which showed up with pulse diagnosis with my Ayurvedic Doctor (vaidya)
1.5 years after I started the primal diet I asked a Chinese medicine doctor about that. He said that is typical for veges as they have a chronic lack of iron and B12.