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Speaker Bios


Erica Peirson, N.D.

Dr. Erica Peirson is a Naturopathic Physician who specializes in the functional medical approach to helping children with Down syndrome, autism and other special needs. She lectures worldwide to educate other physicians and parents about the many ways to optimize the health and cognition of these children. She also helps patients from all over the world through telemedicine and in person at The Peirson Center for Children in Portland, Oregon. She is the mother of a healthy 11 year old son who has mosaic Down syndrome.


Hilary Andrews, N.D.

Dr. Andrews was born at the base of the Canadian Rockies into a family committed to nature and environmental conservation.  Her parent’s raised her with a love of the earth and of animals and it is to that end that she became a naturopathic physician.  She graduated from the National College of Naturopathic Medicine (NCNM) with academic honors and was voted valedictorian by her fellow graduating class.

Her profound interest in optimizing childhood health and nutrition led her to examine developmental delays and behavioral issues in children along with the topic of immunizations and the relationship between the two.  These areas of medicine have become a passion of hers.  She combined the scientific data regarding vaccines, the science of the body and her strong foundational knowledge of health from her naturopathic education to create an optimal approach to infectious disease.  Since 2006 she has lectured extensively on the topic of immunizations and has created several CE courses on the subject.

Dr. Andrews also explores drugless ways to treat children with ADD, ADHD and developmental delays, trying to get to the route issues and provide the body with the tools it needs to achieve more balanced health.

She and her naturopathic husband are the proud parents of an energetic, compassionate young man.  His life has strengthened her determination to help parents create the happiest, healthiest humans on the planet.  She hopes that her passion for natural health is purely contagious, and that she serves as an inspiration.


Sarah McCallister, N.D.

As owner of the Children’s Naturopathic Centre, Dr. Sarah McAllister has devoted her work entirely to the treatment of children. While she does act as a primary care physician, her specialty is in the treatment of children with chronic illnesses. Dr. McAllister has particular interest in helping children with ADHD, autism, sensory processing disorder, developmental delays, PANS and those for whom allopathic care has few solutions. She holds an undergraduate degree in honours biochemistry from McMaster University and graduated from NCNM in 2005.

Paul Thomas, M.D.

Dr. Paul Thomas, M.D., F.A.A.P.,A.B.A.M., received his M.D. from Dartmouth Medical School. He is a board-certified fellow of the American Academy of Pediatrics, and a diplomat of the American Board of Addiction Medicine. He taught residents and medical students from 1988 to 1993, and has practiced pediatrics for over 30 years. In 2008 he opened Integrative Pediatrics, where he currently serves over 15,000 patients, and in 2009 started his Fair Start clinic where he has helped over 500 patients with opiod addiction, in the Portland, Oregon, metro area. He is the Founder of PHOI (Pediatric Health Outcomes Initiative). He is a Founding Director of PIC (Physicians for Informed Consent). He is the author of The Vaccine-Friendly Plan: Dr. Paul’s Safe and Effective Approach to Immunity and Health—From Pregnancy Through Your Child’s Teen Years and The Addiction Spectrum: A Compassionate, Holistic Approach to Recovery. He is the father of nine, three biological, six adopted. Join the over 750,000 other subscribers who follow Dr. Paul on YouTube.

Amanda Watters, N.D.

Amanda Watters, ND is in private practice in Portland, OR at Integrative Pediatrics, and is also an attending physician and Pediatrics Course Co-director at National University of Natural Medicine (NUNM). She completed three years of residency at NUNM, and was the Chief Resident in her final year. In 2017 she also served as the University’s Lead Pediatric Clinician for the Soy Sano/I’m Healthy Grant, which helped provide access to medical care for uninsured pediatric patients. She has a strong interest in developmental and behavioral pediatrics, and a passion for supporting adolescent patients in successfully navigating their transition to adulthood.

Michelle Perro, M.D.

Michelle Perro, MD, is a veteran pediatrician with over thirty-five years of experience in acute and integrative medicine. More than ten years ago, Dr. Perro transformed her clinical practice to include pesticide and health advocacy. She has both directed and worked as attending physician from New York’s Metropolitan Hospital to UCSF Benioff Children’s Hospital Oakland. Dr. Perro has managed her own business, Down to Earth Pediatrics. She is currently lecturing and consulting as well as working with Gordon Medical Associates, an integrative health center in Northern California.




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