 Study Design: This is a 1:1:1:1 four-arm single center prospective randomized feasibility study to compare preoperative nutritional supplementation with an enhanced formula containing immune-modulating agents IMPACT AR for 5 days with 1,2 or 3 cans versus 5 days of 3 cans of comparable iso-caloric iso-nitrogenous supplementation Boost for patients with resectable pancreatic adenocarcinoma. 