Nutrition Therapy

At Portland Natural Health we take nutrition seriously. Maria Zilka, NTP, is one of the country’s most experienced nutrition therapists when it comes to working with cancer patients. She and Dr. Nigh have collaborated since 2008 in the treatment of cancer and other diseases with a combination of naturopathic therapies and targeted therapeutic diets. Maria has worked in collaboration with several other PNH practitioners as well, offering focused dietary guidance in support of their overall treatment program.

Maria continues to write guides that lead patients, as effortlessly as possible, through various therapeutic diets. She has extensive experience with a wide range of therapeutic diets, including low sulfur, low histamine, low polyamine, low FODMAPS and many others. Working with clinic physicians who order and interpret appropriate testing, and/or prescribe a nutrient program, Maria helps each patient implement whichever diet is the most appropriate for their individual health needs.

Maria is also a Certified GAPS Practitioner. GAPS refers to Gut and Psychology Syndrome, a condition where significant imbalances in the digestive system lead to mental health issues including depression, schizophrenia, anxiety, ADHD and even autism.


Maria Zilka, NTP
Bio | Website


Patients of PNH can schedule with Maria through referral by their primary practitioner, and are also welcome to schedule a consultation with her directly by calling 503-445-7767.