Food substitutions may be required if your digestive problems extend to more than just having a stoma.
Protein, especially post-op, is an important element to healing. Not getting enough HIGH-QUALITY protein could delay your wound healing and/or create complications for you after your surgery.
Ensure and Boost seem to be the most popular choices for those coming out of surgery, as they offer an easy to digest, “nutritionally balanced” option for those with digestive difficulties or with restricted ability to eat solid foods (i.e. new ostomates). Unfortunately, neither of the brands offer a vegan option.