The diagnostic test for diagnosing Exocrine Pancreas Insufficiency (EPI) is the Fecal Elastase test. Signs that an individual may have EPI are floating stools, oily sheen on toilet water, light, yellow or orange yellow, moderate to painful cramping and bloating especially after consuming fats, urgency in having a bowel movement, foul smelling flatulence and stool. Food passing through GI tract quickly. Weight loss from malabsorption despite consuming large amounts of food and calories.

These links are informative on signs, symptoms, need for and the administration of PERT-

PANCREATIC ENZYMES
https://letswinpc.org/managing-pancreatic-cancer/2019/10/09/pancreatic-enzymes-explained/