Stefanie Casillas Registered Dietitian

Gastrointestinal nutrition · Surgical care

Nutrition care through every stage of surgery.

Stefanie Casillas is a Registered Dietitian supporting people with complex gastrointestinal conditions before and after surgery.

Meet Stefanie
Portrait of Stefanie Casillas
Clinical practice
Toronto, Ontario
01

About

Evidence-based guidance, grounded in the whole person.

Stefanie works in general surgery at Toronto General Hospital, part of University Health Network. She provides nutrition education and counselling to patients navigating gastrointestinal disease and surgical resection.

Her work spans preoperative preparation and postoperative recovery, helping patients understand changing nutrition needs and manage complex symptoms with practical, individualized support.

02

Approach

Clinical nutrition in context

Care that connects the clinical details to daily life.

A

Perioperative nutrition

Preparing patients nutritionally for surgery and supporting recovery as needs evolve afterward.

B

Complex GI care

Addressing the nutritional impact of altered anatomy, digestive symptoms, and postoperative complications.

C

Education & counselling

Translating clinical recommendations into clear, realistic strategies for patients and families.

03

Clinical focus

Areas of experience

Specialized support for complex gastrointestinal needs.

  • Nausea
  • Malabsorption
  • Pancreatic insufficiency
  • Delayed gastric emptying
  • Dumping syndrome
  • Ileostomy nutrition
  • Postoperative complications
04

Background

From New York to Toronto

A path shaped by curiosity, culture, and care.

Stefanie’s interdisciplinary background brings a broad perspective to her clinical practice and the way she connects with patients.

  1. Boston College

    Bachelor’s in German Studies

    Boston, Massachusetts

  2. Fulbright Program

    Fulbright Scholar in Germany

    Germany

  3. New York University

    Master of Science in Nutrition and Dietetics

    New York, New York

  4. Toronto General Hospital

    Registered Dietitian, General Surgery

    Toronto, Ontario

Nutrition · Education · Advocacy

Helping make complex nutrition care more understandable, practical, and human.