Did a member of your care team prescribe a pancrealipase like Creon or Zenpep after the Whipple? When the head of the pancreas is resected, patients lose up to 82% of the acinar cells that produce the digestive enzymes. This results in Exocrine Pancreas Insufficiency (EPI) where there is not enough digestive enzymes. Food ferments in the intestine leading to excessive gas, bloating and other symptoms.

Other causes of gas- high fiber vegetables and legumes containing oligosaccharides. The human pancreas does not produce the enzyme required to break down oligosaccharides which is alpha-d-galactoside. If you are eating peas, corn, broccoli, cauliflower, cabbage, Brussels sprouts, beans and others, the OTC product Beano is the enzyme alpha-d-galactosidase and will prevent formation of gas by allowing for the digestion of these vegetables.

Some patients may develop an intolerance to lactose found in dairy. To continue eating dairy, Lactaid diary products or taking a lactaid enzyme capsule will ameliorate symptoms.

Pancreatic Enzymes
https://letswinpc.org/managing-pancreatic-cancer/2019/10/09/pancreatic-enzymes-explained/
EPI YouTube Presentations