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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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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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Small Intestinal Bacterial Overgrowth: Comprehensive Guide

Table of Contents Introduction to Small Intestinal Bacterial Overgrowth (SIBO): What is Small Intestinal Bacterial Overgrowth (SIBO)? Causes of Small Intestinal Bacterial Overgrowth (SIBO): Why Does It Happen? Symptoms of... Read More
  • February 2, 2025
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Threonine-Rich Foods To Support Gut Health

The Role of Threonine-Rich Foods in Supporting: Mucin Production, Akkermansia Muciniphila, Faecalibacterium Prausnitzii. Table of Contents 1. Introduction – Threonine-Rich Foods Boosting Gut Health 2. Threonine: The Building Block for... Read More
  • February 2, 2025
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Microbiome, Type 2 Diabetes and Metabolic Health

Gut Microbiome Imbalances in Type 2 Diabetes and Obesity Practicing over three and a half decades and being a gut health maven, I know that obesity is a significant risk... Read More
  • January 31, 2025
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The Microbiome and Common Variable Immunodeficiency

Table of Contents Dysbiosis in CVID Patients Gastrointestinal Symptoms and the Microbiome Immune Modulation by the Microbiome Therapeutic Interventions Supporting the Microbiome and Common Variable Immunodeficiency Future Directions Conclusion Common... Read More
  • January 28, 2025
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Pantothenate: Microbiome-Mediated Regulation and Strategies to Combat Sugar Cravings

The Pantothenate Paradigm Bacteroides vulgatus-Mediated Regulation of Sugar Cravings and Synergistic Microbial Strategies for Metabolic and Neurodegenerative Health. Table of Contents The Microbiome-Gut-Liver-Brain Axis: Insights into Pantothenate and Hormonal Modulation... Read More
  • January 26, 2025
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Polyamines and SCFAs + B Vitamins: The Gut-Neurological Link

Table of Contents Why Polyamines and SCFAs Matter for Gut Health The Link Between B Vitamins and Gut Health How Leaky Gut Affects Overall Health Neurological and Systemic Implications of... Read More
  • January 25, 2025
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AI in Healthcare: Advantages, Disadvantages, and Patient Care Impact

As a doctor and GI health expert, I’m reminded daily how artificial intelligence (AI) is increasingly used by patients seeking preliminary diagnoses and treatment guidance before consulting a healthcare professional.... Read More
  • January 20, 2025
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