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Nila is truly passionate about using food to modify the gut microbiome, and improve health.  She believes that everyone with IBD should be encouraged and supported to incorporate nutritional therapy (in its many individualized forms) into their treatment plan. 


Nila Williamson, MPH, RDN, CD

Nila Williamson is a Registered Dietitian Nutritionist specializing in inflammatory bowel disease and intestinal failure.   

Nila has 15+ years experience working as a pediatric dietitian in primary care and with the gastroenterology division at Seattle Children's Hospital.  She was a dietitian with both the IBD and intestinal rehabilitation programs, supporting the nutrition of complex patients  struggling with severe disease and intestinal surgeries.  Nila has worked with children, adolescents, and adults of all ages with IBD to implement nutritional therapy.  She has experience working with clients using:

  • Exclusive Enteral Nutrition (EEN)

  • Partial Enteral Nutrition (PEN)

  • The Specific Carbohydrate Diet (SCD)

  • The modified Specific Carbohydrate Diet (mSCD)

  • Crohn's Disease Exclusive Diet (CDED)

  • Anti-inflammatory Diet for IBD (IBD-AID)

  • Autoimmune Protocol Diet (AIP)

Nila lives in Olympia, Washington with her husband, two young children, and the sweetest dog there ever was.  As her family grew she had to say goodbye to her clinical position and 60 mile commute to work.  She now works part-time in pediatric primary care and started this practice because she missed having daily poop conversations.  Well actually not really...because she still has those with her 5 year old.  

Nutritional Therapy Expertise

Healthy Eating for IBD

  • General Overview

  • Mediterranean Diet

  • Identifying Trigger Foods

Enteral Nutrition


Exclusive Enteral Nutrition (EEN)

Partial Enteral Nutrition (PEN)

Therapeutic Diets

  • Specific Carbohydrate Diet (SCD) 

  • Modified SCD (mSCD)

  • Crohn's Disease Exclusive Diet (CDED)

  • Anti-Inflammatory for IBD Diet (IBD-AID)

  • Autoimmune Protocol Diet (AIP)

Diet After IBD Surgery

  • Resection

  • J-pouch

  • Colectomy

Education and Credentials

  • RD/RDN: Registered Dietitian Nutritionist, Academy of Nutrition and Dietetics

  • MPH: Masters of Public Health Nutrition, University of Washington, Seattle WA

  • IBCLC: Internationally Board Certified Lactation Consultant, International Board of Lactation Consultant Examiners

  • BS: Bachelors of Science in Food and Nutrition - Dietetics,                             University of Idaho, Moscow ID

  • Academy of Nutrition and Dietetics

  • Pediatric Nutrition Practice Group

  • North American Society for Pediatric Gastroenterology, Hepatology, & Nutrition Council for Pediatric Nutrition Professionals

  • American Society for Parenteral and Enteral Nutrition

  • South Sound Breastfeeding Network

  • Washington State Children with Special Health Care Needs Nutrition Network

Professional Affiliations

Publishing House


  • Ho BE, Chan SC, Faino AV, Mortensen M, Williamson N, Javid PJ, Horslen SP, Wendel D. Evaluation of Smoflipid in pediatric intestinal failure patients and its effects on essential fatty acid levels. JPEN. 2020 May 15: epub.

  • Williamson, N. (2017 and 2020). ‘Nutrition for Health and Disease in Infancy Through Early Childhood: Gastrointestinal Conditions’, in Bernstein, M; McMahon, K. (1st and 2nd editions) Nutrition Across Life Stages. Burlington, MA: Jones & Bartlett, ppg. 212-17.

  • Braly K, Williamson N, Shaffer M, et al. Nutritional adequacy of the specific carbohydrate diet in pediatric inflammatory bowel disease. JPGN. 2017 Apr 17: epub. 

  • Williamson, N. (2016). Review and update to ‘Inflammatory Bowel Disease; including Client Education Materials’, in Pediatric Nutrition Care Manual. Copyright 2018 Academy of Nutrition and Dietetics.  

  • Mortensen M, Williamson N, Davis C, et al. Iodine deficiency in a parenteral nutrition-dependent adolescent with intestinal pseudo-obstruction. JPEN. 2014 Sep 26; epub.

  • Suskind DL, Wahbeh G, Gregory N, et al. Nutritional therapy in pediatric crohn disease: the specific carbohydrate diet. JPGN. 2014 Jan; 58(1):87-91.

Professional Speaking/Presentations

2012-2019   Nutrition Management of IBD and Celiac Disease, General GI conditions,                              and The Specific Carbohydrate Diet.  Assuring Pediatric Nutrition in the                                  Community Annual Conference. Seattle, WA.


2018              Specific Carbohydrate Diet: The Ins and Outs. North American Society for                              Pediatric Gastroenterology, Hepatology, and Nutrition (NASPGHAN).                                  Hollywood, FL. 

                        Less by Tube and More by Mouth, Without Prolonging TPN.  Poster                                          Presentation.  Pediatric Intestinal Failure and Rehabilitation Symposium.                                  Pittsburg, PA. 

                        Nutrition Interventions for the GI Population.  King County WIC Program.                              Seattle, WA.


2016              Iodine Deficiency and Thyroid Dysfunction: The Experience of a Pediatric                               Intestinal Rehabilitation Program. Pediatric Intestinal Failure and                                               Rehabilitation Symposium.  Los Angeles, CA. 

                       IBD Nutrition Episodes 1-3 [Audio podcast]. 

                       Available at:


2014            Non-Celiac Gluten Sensitivity. Seattle Children’s Hospital Nutrition                                          Symposium. Seattle, WA.

2012            Gluten-Related Disorders. Snohomish Countywide WIC Conference. Seattle,                        WA.

Audience and Lecturer
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