Maybe. It depends on what is causing the disease and how bad the disease is. I've seen milk thistle improve function for some people, but dont expect miracles.
Liver. The liver is remarkable. If the problem causing your liver inflammation is removed the liver can heal itself. If you have hep c, make sure you are drinking four cups of coffee per day until the new curative treatments can be used on you. Milk thistle is used all over the world to assist in this situation.