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Steven Sandberg-Lewis, ND, DHANP

Portland, Oregon | USA

Dr. Sandberg-Lewis is a practitioner of Naturopathic gastroenterology. He has been in practice for over 40 years and has been a professor of gastroenterology at the National University of Natural Medicine (NUNM) in Portland, Oregon for 22 years. He continues to engage in patient care at Hive Mind Medicine in Portland, Oregon. He is a frequent presenter at educational seminars internationally and has writes a column entitled Functional Gastroenterology Bolus for the Townsend Letter. Sandberg-Lewis is the focus of numerous podcasts, interviews and webinars. His website is


Dr. Sandberg-Lewis often treats patients whose health conditions have defied diagnosis despite exhaustive medical testing or complex digestive disorders that have not responded to treatment. Areas of special focus include irritable bowel syndrome, SIBO, GERD, hiatal hernia, inflammatory bowel disease (including microscopic colitis), biliary dyskinesia, gastroparesis and unrelenting nausea.


Dr. Sandberg-Lewis is the author of the textbook entitled Functional Gastroenterology: Assessing and Addressing the Causes of Functional GI Disorders (2017, He and his family have also created a comic book explanation of SIBO entitled Nuthin’ Funnies about SIBO.


For more information on Dr. Sandberg-Lewis's practice, go to

"Occult Oral Infections – Uncovering Hidden Sources of SIBO"


Dr. Sandberg-Lewis will use a case of a 62 yo female with methanogenic SIBO and chronic unresolved dental infections to illustrate the importance of oral abscess as a source of SIBO and its symptoms. Her endodontist had told her that there were no remaining infections. Dr. Sandberg-Lewis had treated her for over a year with some moderate-good responses to treatment before further investigating the oral issues. The investigation was prompted by a relapse of her symptoms despite significant improvement in breath test results. On referring her for a second dental opinion, 5 areas of infection were found along with a stray bone fragment from a previous dental extraction. After just a few injections of ozone into the infected areas and removal of the bone fragment, she had total normalization of her GI and systemic symptoms.

Dr. Sandberg-Lewis will demonstrate the use of a relatively simple applied kinesiology technique that he uses to investigate the presence of significant dental health issues in his GI patients.

Learning Objectives:

  • Participants will understand the common role of archaea in oral infections

  • Attendees will learn screening techniques for assessing the possibility of oral infections as underlying causes of SIBO.

  • Participants will appreciate the various types of dental infections including gingivitis, dental plaque, periapical and periodontal abscesses.

  • Attendees will learn about options for treatment of dental infections to remove the underlying cause of SIBO.

Past Conference Participation

2017 Integrative SIBO Conference - Chicago, Illinois

~ Featured Speaker ~

"SIBO, the Liver, Cognition, Depression and Anxiety"

2017 NMSA Annual Conference - Phoenix, Arizona

~ Featured Speaker ~

"The Only Good H. Pylori Is A Dead H. Pylori, Right?"

2018 Integrative SIBO Conference - New Orleans, Louisiana

~ Panelist ~

2019 Integrative SIBO Conference - Seattle, Washington

~ Panelist ~

2020 Integrative SIBO Conference - San Diego, California

~ Featured Speaker ~

"Occult Oral Infections – Uncovering Hidden Sources of SIBO"




2017 Integrative SIBO Conference Teaser

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