Digestion Coach

37 Years In Practice

No Case Too Complicated

Free 15-Minute Consultation

Call Today 714-639-4360

Dr. Marcus Ettinger

Welcome to The Digestion Coach ™

I’m Dr. Marcus Ettinger, The Digestion Coach ™, your go-to SIBO specialist, resource, and clinician for all conditions that relate to digestive function. Here, you’ll find straightforward information about the digestive system, related conditions, and how to book a consultation. This site also serves as an additional resource to enhance the care and support I provide my patients at my office or worldwide via telemedicine.

630 S. Glassell St. #103. Orange, CA 92866

Abdominal Pain, SIBO, H. pylori, IBS/IBD, Constipation, Diarrhea, GERD, Gastritis, Abdominal Bloating, Food Intolerance, etc, and all related issues associated with these conditions.

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EXPERIENCED DOCTOR

Dr. Marcus Ettinger, BSc., DC. “The Digestion Coach ™.”

37 years as an IBS, IBD, H. pylori, and SIBO specialist.

COMPREHENSIVE TESTING

The correct diagnostic tests can help determine the exact cause of the problem and assist in the best plan of action.

NUTRACEUTICAL SUPPORT

You’re only as good as the tools you have to work with. I have just about all of them.

PROVEN PROTOCOLS

37 years and 1000s of successfully treated patients helped build the proven protocols used.

DIGESTION COACH ARTICLES

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KPV Peptide GI–Neuro Protocol

The KPV Peptide GI–Neuro Protocol – A Root-Cause Approach to Gut, Immune, and Nervous System Imbalance   If you struggle with chronic digestive...Read More
February 10, 2026
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Vitamin B1 for Gut Motility: IBS Constipation and SIBO Relief

Vitamin B1 for gut motility may be an often-overlooked area of opportunity. If you have IBS or SIBO, you may feel stuck...Read More
January 24, 2026
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Chiropractic Care for IBS and SIBO: Relief for Bloating & Motility

If you have IBS or SIBO, you are not alone. Bloating, gas, abdominal pain, constipation, and diarrhea can disrupt daily life. Quick...Read More
January 21, 2026
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Thiamine Deficiency, SIBO, and Dysautonomia

Thiamine Deficiency, SIBO, and Dysautonomia – A Patient-Friendly Guide Table of Contents Cause, consequence—or both? Hydrogen sulfide, mitochondria, and low energy Key takeaway...Read More
January 4, 2026
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