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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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Do SIBO Symptoms in Women Differ from Men?

Small Intestinal Bacterial Overgrowth, or SIBO, is a condition where excessive bacteria in the small intestine disrupt digestion, leading to uncomfortable SIBO symptoms in women and men, like bloating, abdominal... Read More
  • April 12, 2025
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Fructose Intolerance and IBS Connection

Fructose Intolerance and The Underdiagnosed Connection Mistaken for IBS Table of Contents What is Fructose Intolerance? Symptoms of Fructose Intolerance Fructose Intolerance and Unexpected Weight Gain: The Link Fructose Intolerance... Read More
  • April 11, 2025
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Nitric Oxide Activation For Biofilm Dispersal – A Novel Approach

Nitric Oxide: A Natural Way to Break Up Biofilms and Fight Infections Table of Contents Introduction Nitric Oxide from iNOS (Immune Response) Nitric Oxide from eNOS (Blood Flow) Sunlight and... Read More
  • April 11, 2025
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Healthy Aging Odds Can be Boosted with Diet and Sunlight

Aging gracefully isn’t just luck—it’s a science. Recent research shows that your diet, sunlight exposure, and timing can boost your odds of healthy aging. Picture yourself past 70 with a... Read More
  • April 8, 2025
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Type 2 Diabetes and NAFLD Managed with Betaine and Lifestyle 

Living with type 2 diabetes (T2D) or nonalcoholic fatty liver disease (NAFLD) can feel overwhelming, but there’s hope in a simple, science-backed plan. Research shows that low levels of betaine—a... Read More
  • April 5, 2025
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The Gut Axes: Resilience and Sunlight Microbiome Connection

The Gut Axes as Adaptive Conduits: A Bidirectional Network of Resilience and Sunlight Microbiome Connection Doing what I do as a decades-long practicing doctor and dedicated digestion coach, I often... Read More
  • April 4, 2025
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Phenolic Glycosides for Gut Health

Phenolic glycosides for gut health are plant-derived compounds with a phenolic structure linked to a sugar group, offering significant benefits by reducing intestinal inflammation and enhancing resistance to pathogens. These... Read More
  • April 1, 2025
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A diet rich in choline, carnitine, and tryptophan may increase cancer risk by producing trimethylamine n-oxide (TMAO) and indole-3-acetic Acid (IAA) metabolites.

Is There a Choline, Carnitine, Tryptophan Cancer Risk via Diet? Trimethylamine N-oxide (TMAO) and indole-3-acetic acid (IAA) are metabolites produced by gut microbiota from specific dietary precursors found in certain foods.... Read More
  • March 30, 2025
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