Pioneering Education in Metabolic Oncology Nutrition Therapy
250-Hour Oncology Nutrition Consulting (ONC) Certification Program
Fall Term 2026 Application/Registration Deadline: September 11, 2026
10-week Fall term Classes start: September 21, 2026
FALL Term courses end: November 29, 2026
“It is not enough for a cancer patient to receive appropriate conventional therapy for his or her disease. To improve quality and quantity of life, a regimen of good nutrition is essential.”
– Dr. Linus Pauling, PhD, twice Nobel laureate, pioneer in nutrition for cancer patients
The Oncology Nutrition Institute (ONI) was founded in 2017 to provide evidence-based educational certification and training programs in the field of modern, metabolic, innovative, integrative, and outcomes-based oncology nutrition therapy. Our online programs teach students worldwide about the medicinal potential of metabolic dietary therapies, including the Ketogenic Diet, Time Restricted Eating, Therapeutic Fasting, Autoimmune Paleo (AIP), The GAPS Diet (Gut and Psychology Syndrome), Low FODMAP, tube feeding, Paleolithic and Mediterranean diets. The programming at ONI is rooted in ancestral food-first approaches.
Our flagship 250-Hour Oncology Nutrition Consulting (ONC) certification program is for qualified practitioners with a desire to learn the high demand safe use of nutrition alongside conventional treatments, nutrient-drug interactions, terrain assessments, micronutrients, phytonutrients, lifestyle medicine interventions, nutritional psychology, and more. We teach how to translate research into recipes and how to integrate lifestyle medicine interventions into daily practice. An estimated 1 in 3 cancer patients ask their doctor what to eat and ONC's know how to answer with authority and evidence.
Alongside a founding advisory board, the school was created by internationally recognized and award-winning journalist and nutritionist, Jess Higgins Kelley, MNT, ONC. Jess’s book, The Metabolic Approach to Cancer: Integrating Deep Nutrition, the Ketogenic Diet, and Non-Toxic Bioindividualized Therapies, is one of over a dozen highly curated books in the ONC program. Today, ONI is recognized globally for providing leading edge education programs, and our highly esteemed graduates are located in over twenty different countries. We believe that metabolic nutrition and lifestyle medicine should be at forefront of the standard of cancer care. Because it works.
Programing based on the best-selling book The Metabolic Approach to Cancer
Written by ONI Founder Jess Higgins Kelley, MNT, ONC
The Metabolic Approach to Cancer book is the center-piece in the first of four, 10-week courses in the 250-Hour Oncology Nutrition Consulting (ONC) Certification Program. The best-selling book was co-written by the Founder of the Oncology Nutrition Institute. Since the book was first published in 2017 it has sold over 100,000 copies and is now translated into seven other languages. Thank you to everyone who has bought the book!
In Chapter Two there is a quiz to Assess Your Terrain. This assessment tool is a novel way to evaluate the presence of potential drivers behind a disease process. From there the quiz provides ten terrain-based approaches to integrate specific to bio-individualized priorities. The proven outcomes from taking a metabolic approach is to become more vital and balanced than ever before. Learn more about yourself and feel free to use this assessment tool with your clients/patients.
"To know thyself is the beginning of wisdom."
- Socrates, Temple of Apollo
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