About Root Cause Nutrition

Root Cause Nutrition is an outpatient nutrition counseling practice supporting adolescents and adults struggling with eating issues, body image struggles, digestive health conditions and more. In person support provided in Phoenix, Arizona and telehealth services provided throughout the states of Arizona, California, Colorado, Idaho, Louisiana, Michigan, New Jersey, Utah, Washington, Wisconsin and Wyoming evidence-based care.

Expert Eating Disorder Care

Specialized nutrition counseling from a certified eating disorder dietitian with extensive experience treating all types of eating disorders.

Digestive Health Solutions

Comprehensive support from a certified gastrointestinal nutritionist to address IBS, GERD, and other digestive conditions.

Convenient Access

Choose between in-person sessions in the Phoenix Valley or telehealth appointments available across multiple states.

Root Cause Nutrition by the Numbers

Trusted expertise and accessible care for your nutrition and wellness needs.

10+

Years of Experience

12

States Served

500+

Clients Supported

Meet Liz Lees, MS, RDN, CGN

Liz is an eating disorder dietitian and certified gastrointestinal nutritionist with over 10 years of clinical experience. She received her undergraduate dietetics degree from Arizona State University and went on to complete her masters of science in clinical nutrition and dietetic internship from Rush University. Liz took an early interest in gastrointestinal disorders and specialized nutrition support (EN, PN) before gaining experience in the mental health field with eating disorders. Now Liz loves to be able to bring those two passions together to support individuals with eating disorders/disordered eating behaviors suffering from bothersome digestive issues. Traditional GI "elimination diets" can be overwhelming, difficult to follow and potentially harmful long term. Often, they do not address the root cause of digestive issues. Liz uses a compassionate approach in her work, meeting you where you are at and serving as your advocate throughout the recovery journey. She incorporates evidenced-based nutrition education into her sessions believing in the power of knowledge to bring about motivation for change.