Experienced Expert Dietitian

Registered Dietitian Nutritionist (RDN), since 2012
Master of Science in Nutrition, since 2012

Founder, UCLA Division of Digestive Diseases GI Nutrition Program (2012-Present)

Supervisor, UCLA Division of Digestive Diseases GI Nutrition Program (2018-2024)

Dietitian Specialist, UCLA Division of Digestive Diseases GI Nutrition Program (2024-Present)

Nancee Jaffe Nutrition Services Private Practice (2012-Present)

Lead Dietitian, Saint Supply, Living Elixir High Phenolic Olive Oil (2018-Present)

Services

  • 60 or 90 minute assessment and evaluation available. Includes a comprehensive review of medical history, diet history, current symptoms, supplements and creation of an individualized custom plan

  • 30 minute return visit to evaluate effectiveness of customized plans, current state of symptoms, any changes in diet / lifestyle / medications or supplements and create next steps

  • Includes either a 60 or 90 minute initial consultation with 2x 30-minute follow up visits at a discounted price

  • Includes 3x 30-minute follow up visits at a discounted price

  • Worried about gut dysbiosis or issues with your gut microbiome? This comprehensive program of 1 initial session and 2 follow ups includes a full assessment (medical history, symptom history, diet and supplement review) followed by stool and/or blood testing. Using the data collected, an individualized diet and supplement protocol will be created to help repair and heal the gut at the cellular and microorganism levels

  • Not sure if working with NJNS is right for you? Want more information before booking a session? Consider booking a free discover call to learn more.

Conditions Seen

  • Autoimmune and Auto-Inflammatory Conditions

  • Celiac disease and other gluten-associated disorders

  • Diverticular disease

  • Dysautonomia and other related conditions such as POTS and MCAS

  • Food allergies, including non-IgE related allergies

  • Gastroesophageal reflux disease (GERD), also called acid reflux

  • Gastroparesis

  • GI cancers, including colorectal, stomach, esophageal

  • Inflammatory bowel diseases (IBD), including Crohn’s disease and ulcerative colitis

  • Irritable bowel syndrome (IBS) and other disorders of the gut-brain interaction

  • Longevity and Healthy Lifestyle

  • Menopause and Perimenopause

  • Pelvic floor dysfunction and endometriosis

  • Rheumatological conditions such as rheumatoid arthritis and scleroderma

  • Small intestinal bacterial overgrowth (SIBO) and intestinal methanogen overgrowth (IMO)

  • Small bowel obstructions

Patient Testimonials

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Patient Testimonials *

“Thank you so much!!! Please know that you truly are the best clinician that I have ever worked with (across any field) and in three short meetings you have made a profound impact on my health and well-being.” - A.G.

“I first consulted with Nancee Jaffe about a year ago for some intractable dietary-related issues.  Her tremendous knowledge, coupled with her caring and supportive nature, were just what I needed.  Her advice has been (and continues to be) terrific and I recommend her highly without any reservation.” - T.L.

“Nancee Jaffe was a blessing in my life at the right time.  I thought I had a food allergy, but Nancee quickly had me make an appointment to see an Allergy Specialist to get to the root cause of the gastrointestinal issues/rashes.  I was not allergic to a specific food, but found out I react to foods high in histamine.  Nancee helped me with proper foods to eat as well as foods to avoid.  I have made changes in my diet, eating much healthier and now feeling much better! Thank you Nancee!” - V.H.

“Nancee is as good as they come! The depth of her knowledge, her practical approach that considers the whole mind and body and her welcoming and inclusive demeanor make her talent unparalleled. I went to 4 doctors when I was tired for over a year and the only one who figured out I had an iron deficiency was Nancee- She's a gem, takes her time and is truly a blessing to have in your corner.” - C.L.

“I want to express my extreme gratitude, to have met and have worked with Nancee Jaffe. She has been truly my anchor, in navigating the complex issues of Disease and nutrition. I had met with 6 other nutritionist. None of them, were at a level of intelligences, to figure out what, I really needed to improve my Health.  Nancee cares at a deep level and becomes your reason for thriving.” - L.D.

“Nancee was a wonderful resource and a huge help in healing my gut health and laying the foundation for a healthy pregnancy. I always found her sessions to be extremely informative and enlightening. She offers up solutions that are approachable, sustainable, and do not disrupt daily living. “ -A.L.

“I was referred to Nancee Jaffe for help treating complex GI issues. She is the first person to address the big picture: nutrition. So many of us ask: what healthy foods will help manage my disease?  How do I shop and prepare meals? How do I make this pleasurable and less stressful? What new products are here? Nancee has pushed these answers forward with science and medicine-based ideas, introducing me to new foods and  supplements to treat micro-nutrient deficiencies and discomfort. Her positive spirit has given me hope and my health continues to improve. I feel so fortunate to be in Nancee Jaffe's care and always look forward to our sessions.” - S.L.

“Nancee Jaffe is outstanding.  She is very knowable, helpful, easy to work with and has helped me personally. I highly recommend her.” - T.P.

 Publications & Videos

Publications

  • Chen E, Mahurkar-Joshi S, Liu C, Jaffe N, Labus J, Dong T, Gupta A, Patel S, Mayer EA, Chang L. The Association Between a Mediterranean Diet and Symptoms of Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2023

  • Cuff, C., Lin, L., Mahurkar-Joshi, S., Jacobs, J., Lagishetty,  V., Jaffe, N., Smith, J., Dong, T., Sohn, J., Chang, L., Randomized Controlled Pilot Study Assessing Fructose Tolerance During Fructose Reintroduction in Non-Constipated Irritable Bowel Syndrome Patients Successfully Treated with a Low FODMAP Diet."  accepted for publication in Neurogastroenterology and Motility. Arpil 2023

  • Dua, A; Corson, M; Sauk, J; Jaffe, N; Limketkai, B: Impact of Malnutrition and Nutrition Support in Hospitalized Patients with Inflammatory Bowel Disease. Alimentary Pharmacology & Therapeutic, January 2023

  • Limketkai BN, Hamideh M, Shah R, Sauk JS, Jaffe N. Dietary Patterns and Their Association With SymptoCuff, C., Lin, L., Mahurkar-Joshi, S., Jacobs, J., Lagishetty,  V., Jaffe, N., Smith, J., Dong, T., Sohn, J., Chang,ms Activity in Inflammatory Bowel Diseases. Inflamm Bowel Dis. 2022 Nov 2;28(11):1627-1636. doi: 10.1093/ibd/izab335. PMID: 35092268.

  • Noorian, S. Chau, L. Yaceczko, S. Jaffe, N. Limketkai, B. Perioperative nutrition for gastrointestinal surgery: on the cutting edge; Nutrition in Clinical Practice, 2023

  • Lenhart, A., Labus, J., Joshi, S., Dong, T., Jacobs, J., Jaffe, N. Mayer, E., Chang, L.; Colonic Mucosal Microbiota is Associated with Bowel Habit Subtype and Abdominal Pain in Patients with Irritable Bowel Syndrome, American Journal of Physiology-Gastrointestinal and Liver Physiology, 2022

  • Lenhart, A. Dong, T. Joshi, S. Gupta, A. Liu, C. Jaffe, N. Choo, C. Jacobs, J. Tillisch, K. Labus, J. Mayer, E. Chang, L. (2021). Effect of Exclusion Diets on Symptom Severity and the Gut Microbiota in Patients with Irritable Bowel Syndrome. Clinical Gastroenterology and Hepatology (CGH)

  • Thompson, T., Jaffe, N., Keller, A., Smith, J. (2019) Dietitian experiences using a novel portable personal testing gadget for gluten. Medical Nutrition Matters Newsletter, volume 38, number 1

  • Simpson, S. M., Ciaccio, E. J., Case, S., Jaffe, N., Mahadov, S., Lebwohl, B., & Green, P. H. (2013). Celiac Disease in Patients With Type 1 Diabetes: Screening and Diagnostic Practices. The Diabetes Educator, 39(4), 532-540. 

Videos

About NJNS

My deep love and commitment to studying and working with the digestive tract started in 2002 when I learned that I had contracted a parasite during my brief study abroad in Ecuador. Existing in my body for 1.5 years allowed the parasite to grow to about 1.5 feet long. When it came out, I began to experience unexpected and disruptive symptoms; dizziness, fainting spells, sensations of extreme hunger, depression, bloating, weight loss, indigestion. After seeing 7 doctors and spending 6 long years searching for answers, I was finally diagnosed with a gastrointestinal, nutritionally-based, auto-immune disease ---- celiac disease.

Within 2 weeks of my diagnosis and 2 weeks of compliance with a gluten-free diet, all of my symptoms disappeared. Knowing how GREAT I now felt and remembering just how long and hard a journey I had endure in order to get diagnosed, I decided that I needed to be a healthcare practitioner who could help those suffering with gastrointestinal disorders of all kinds.

After over 10 years of practicing as a clinical dietitian at UCLA, my expertise and interest has expanded to conditions involving the immune system, allergies, rheumatological disorders, dysautonomia and the role of diet to reduce inflammation in the body.

Professional Affiliations:

  • Committee Chair, ROME Foundation Nutrition and Dietetic Section

  • Committee Member, Certified Specialist in Digestive Health

  • Board Member, NERVA Gut Directed Hypnotherapy App

  • Leader of the UCLA Dysautonomia Multidisciplinary Task Force

  • Board Member for Los Angeles Dysautonomia Network (LADN)

  • C0-leader of the UCLA GI project to expand outpatient dietitian services

  • Key Member, UCLA Robert G Kardashian Center for Esophageal Health

  • Founder, UCLA GI Nutrition Program, UCLA

  • Stomach Cancer Awareness Network Medical Board

  • Member of the Academy of Nutrition and Dietetics

  • Member of Dietitians in Gastrointestinal Disorders (DIGID)

  • Initiator, partnership of  Dietitian In Gastrointestinal Disorders (DIGID) for Academy of Nutrition and Dietetics and American Gastroenterological Association

  • Low FODMAP Diet Advisory Board Member Monash University

  • American Gastroenterological Association reviewer AGA patient initiatives – Short Bowel Syndrome and Low FODMAP Diet


Honors and Awards:

  • Healio Disruptive Innovator Partner in Practice winner 2024

  • Best original clinical article of 2022, journal Inflammatory Bowel Diseases

  • Phi Beta Kappa; Magna Cum Laude

  • Golden Key Society

  • Certificate of Honor

  • Adelle Davis Foundation Scholarship

  • Alpha Lambda Delta

  • Presidential Honor Role