Immunity is not a function most people particularly associate with the liver. But because of its connection to the gut, the liver is exposed to bacterial metabolites as few other organs are. And when either the liver or the gut is not functioning well, it can adversely affect immunity as well. The liver is connected to the gut via both the biliary system and the portal vein. Those two conduits allow metabolites from the gut microbiome to influence what’s going on in the liver. Both liver and gut damage can affect this communication for the worse. And surprisingly, one of the consequences is immune dysfunction.