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Dan Loewensteiner PhD, RDN

The Autism RD
1714 Stone Creek Drive
Petaluma, CALIFORNIA 94954

Autism is a treatable disorder! There is hope that your child can be on the road to recovery! Much of the damage to our children created by our toxic environment and unhealthy foods can be reversed! Recent advances in the understanding of the genetics of autism, as well as the complex interplay of environmental factors and the underlying biochemical and physiological abnormalities in children on the spectrum has refined our approach in using dietary and biomedical interventions to treat autism. If you are interested in exploring these approaches to heal your child on the autism spectrum, then I would like to talk with you! I take a holistic approach in treating your child. Each child is unique, with unique, dietary and nutritional needs. You can be assured that my recommendations, whether dietary, supplementation, healing of the gut or immune system, are all based on scientific and clinical evidence and are designed to best meet the needs of your child. My treatment protocol proceeds in phases. These include: 1) addressing feeding issues and dietary quality; 2) "cleaning up" of diet and environment; 3) dietary restrictions; 4) introduction of appropriate dietary and nutritional supplements; 5) further refinement of diet; 6) promotion of gut health, 7) lab tests to determine additional supplementation.

  • Developmental Disorders
  • Alternative Nutrition
  • GI/Digestive Disorders
  • Vitamins, Minerals, Supplements
  • Food Allergies
  • Pediatric Nutrition
Work History

I have worked for a Regional Center (Valley Mountain Regional Center, Stockton) for 14 years. As their consultant dietitian, I provided nutrition assessment and intervention for individuals with a variety of developmental disorders, with a focus on feeding issues and providing nutritional and dietary guidance. I have also been a member of the Interdisciplinary Feeding Disorders Clinic, working with children with complex feeding issues, including those on the autism spectrum. During this time, I became increasingly interested in treating children with autism and ASD. As I learned more about dietary and biomedical interventions, I felt that I was not able to provide adequate treatment within the context of working for the Regional Center. I developed a tremendous respect and admiration for parents of autistic children and a great desire to use my experience and knowledge toward empowering them to enable their child to reach their highest potential. When we moved to beautiful Sonoma County, I decided to devote all my efforts as a private practice dietitian toward using dietary and biomedical treatment protocols, with a practice focusing on children on the autism spectrum. I have developed a real passion for treating ASD children, as the results of treatment can have a truly profound impact on their lives and the lives of their families.


B.S. University of Illinois; PhD. Purdue University; Didactic program in dietetics, University of California, Davis; Dietetic Internship, Napa State Hospital; Continuing professional education, with focus on issues related to autism.

Focus Age

Birth through early childhood.


Academy of Nutrition and Dietetics; Pediatric Nutrition Practice Group; Dietitians in Integrative and Functional Medicine.

Payment Methods

all forms

Insurance Taken


  • Registered with the Academy of Nutrition and Dietetics
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