The pancreas' main exocrine function is to produce enzymes which help digest carbs
, and fats.
These enzymes are made in acinar cells and travel
down a duct to the small intestine (2nd stage of duodenum). Insufficiency can either be from an obstruction in said duct or a decreased synthesis of the enzymes from damage or fibrosis of pancreatic tissue, most commonly secondary to pancreatitis
Answer assisted by Rishi Kumar, Medical Student