Inclusion Criteria:  Able to provide written informed consent prior to initiation of any study procedures Planned myeloablative allogeneic stem cell transplantation (note, melphalan dose of 140 mg/m^2 is included) with planned hospital admission for transplant At least 18 years of age  Exclusion Criteria:  Major psychiatric diagnosis that impairs cognitive functioning or is not controlled at the time of the approach, as judged by the patient's medical team Currently receiving EN or parenteral nutrition (PN) Physical restrictions to the placement of a nasoenteric feeding tube