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Pancreatic elastase is an enzyme produced by the pancreas that aids in the digestion of proteins. It is an important marker in assessing the function of the pancreas and diagnosing exocrine pancreatic insufficiency (EPI), a condition where the pancreas does not produce enough digestive enzymes. The stool elastase test is commonly used to measure pancreatic elastase levels. This non-invasive test helps determine if the pancreas is functioning properly, with lower levels indicating pancreatic exocrine insufficiency. EPI can cause symptoms such as belly pain and digestive problems and can lead to malnutrition if left untreated. Treatment for EPI typically involves pancreatic enzyme replacement therapy (PERT), which helps improve digestion and nutrient absorption. Prompt diagnosis and treatment of EPI can alleviate symptoms and prevent complications associated with malnutrition.