Study of Nutritional Supplement Shakes in People About to Receive Their Debulking Surgery for Ovarian Cancer

Inclusion Criteria: * Age ≥ 18 * Scheduled to undergo primary surgical debulking of ovarian, fallopian tube and primary peritoneal cancer * Have a sufficient preoperative window during which the intervention can occur, with the last day of supplementation at least one and no more than two days prior to surgery; scheduling of the procedure should not be delayed due to participation in this investigation Exclusion Criteria: * Have received neoadjuvant chemotherapy * Debulking surgery scheduled less than 8 days from initial visit * Are scheduled for a minimally invasive procedure * Unable to tolerate oral intake or have gastrointestinal issues that would prevent or prohibit oral supplement consumption * Have diabetes mellitus * Have allergies to the Ensure Surgery Immunonutrition Shake supplement * Have galactosemia