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Welcome to the blog of “The Digestion Coach,” Dr. Marcus Ettinger.

As a practicing doctor of 36+ years and GI health specialist, I have studied, written, and treated the human body for a long time. I created this blog to provide easy-to-understand information on complex topics and to help anchor everything I study. I hope the information on my blog increases your understanding of the body, disease, and health.

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Bifidobacterium breve for infant health and immunity

Bifidobacterium breve for Infant Gut Health and Immunity

Bifidobacterium breve, or B. breve, is vital for a baby’s gut health. This helpful bacterium thrives on nutrients in breast milk, especially human milk oligosaccharides (HMOs). It builds a strong... Read More
  • March 9, 2025
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MS-Gut-Immune-Restoration-Protocol

MS Gut-Immune Restoration Protocol

The Gut-Immune Connection in MS and B-Cell Dysregulation Multiple sclerosis (MS) disrupts the gut-immune connection, but the MS gut-immune restoration protocol offers hope for rebalancing this critical axis. In MS... Read More
  • February 22, 2025
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Oral-microbiome-support

Oral Microbiome Support: Balance Bacteria for Optimal Health

Oral Microbiome Support Guide Table of Contents Key Terms and Definitions Key Beneficial Bacteria in the Oral Microbiome Harmful Strict Anaerobic Bacteria in the Mouth Strategies for Oral Microbiome Support Daily... Read More
  • February 17, 2025
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Pemphigus Vulgaris, Bullous Pemphigoid and microbiome2

Pemphigoid vs Pemphigus and Microbiome Testimonial

Bullous Pemphigoid vs. Pemphigus Foliaceus vs. Pemphigus Vulgaris and Microbiome Relationship: Diagnosis, Support, Resolution, and Testimonial Patient: A 77-year-old female experiencing pain and fluid-filled blisters all over her body and... Read More
  • February 12, 2025
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Gut-Transit-Time-and-Health

Gut Transit Time and Health Impact

Table of Contents What Is Gut Transit Time? Gut Motility and the Role of the Gut Microbiome Health Impacts of Slow Gut Transit Time Health Impacts of Fast Gut Transit... Read More
  • February 11, 2025
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indole-producing bacteria for anxiety

Indole-Producing Bacteria for Anxiety: Novel Therapy

Indole-Producing Bacteria for Anxiety-Related Disorders and Modulating the Gut-Brain Axis Table of Contents Introduction Key Takeaways Indole-Producing Bacteria and Their Metabolites How Indole-Producing Bacteria Influence Anxiety Digestion Coaching Strategies to... Read More
  • February 7, 2025
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The-Role-of-Specific-Gut-Bacteria-in-Health-Antitumor-Immunity-and-Postbiotic-Metabolism.

Antitumor Immunity and Gut Bacteria

The Role of Specific Gut Bacteria in Health, Antitumor Immunity, and Postbiotic Metabolism   Table of Contents Key Dietary Compounds Metabolized Here’s a Comprehensive List of Foods that Support the... Read More
  • February 4, 2025
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Predisposing Factors that Cause SIBO

Predisposing Factors that Cause SIBO

As a digestion coach and SIBO expert, I have treated hundreds of SIBO patients since before the term was used as a diagnosis. Small intestinal bacterial overgrowth (SIBO) occurs when... Read More
  • February 3, 2025
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