I swear by Marin. Lady doesn't have liver disease, but has been taking phenobarbital for eight years which damages the liver. I gave her plain milk thistle (Silybin) for years until a gal on another forum with an MVD dog told me about Marin. I believe Dr. Tobias from University of Tennessee recommended Marin to her.
http://www.entirelypets.com/marindog...utmk=137689585