Malabsorption Blood Test (MBT) to Determine Exocrine Pancreatic Function and Related Quality of Life in Chronic Pancreatitis

Inclusion Criteria * ≥ 18 years of age * RAP (≥ 2 documented lifetime attacks with ≥ 2 of 3 acute pancreatitis criteria) OR Chronic pancreatitis (Cambridge I or II with documented history of AP OR Cambridge III or IV criteria) * Fecal elastase ≥ 50 within the preceding 12 months Exclusion Criteria * Allergy/Intolerance to PERT/MBT * Taking medications that alter fat absorption or that supplement the fatty acids being studied (e.g. orlistat, ursodeoxycholic acid, Fatty-15 fatty acid supplement etc.) * Taking GLP-1 Receptor Agonist therapy * Fecal elastase \<50 within preceding 12 months OR pre-existing diagnosis of severe Exocrine Pancreatic Insufficiency, or ongoing steatorrhea * Receiving Pancreatic Enzyme Replacement Therapy for \> 5 days within the preceding 30 days * Acute Pancreatitis attack (documented and meeting at least 2 of 3 criteria) within the preceding 90 days * History of pancreatic resection or underlying malabsorptive disease * Pregnant or Breast Feeding * Other significant medical condition as judged by Principal Investigator