In several ways
The main reason is that the liver produces bile
, which goes through ducts into the gallbladder, and when you eat, the gallbladder contracts and squirts bile into the first part of the intestine
, the duodenum. Bile is helpful in the digestion of fat, and without it, there may be problems digesting it normally.
In addition, blood backs up in cirrhosis and swells the GI lining, which causes problems.