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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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Fenugreek for Gut Health & Weight Loss

How Does Fenugreek Work with the Gut and Microbiome? Fenugreek microbiome interactions drive its benefits for gut health, glucose control, and weight loss. People often search, “How does fenugreek work... Read More
  • September 14, 2025
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Gut Bacteria Support Weight Loss

Gut Bacteria Support Weight Loss: Top Prebiotic Foods to Boost Your Microbiome Table of Contents What Gut Bacteria Promote Weight Loss? How Do These Bacteria Support Weight Loss? What Foods... Read More
  • September 13, 2025
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Microbial Metabolite for Liver Repair: Supporting Gut-Liver Axis

Microbial Metabolite via Gut-Liver Axis Repairs Damaged Liver 10-hydroxystearic acid (10-HSA), a microbial metabolite for liver repair key player in the gut-liver axis. The gut-liver axis is a vital pathway... Read More
  • August 30, 2025
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Queuosine: The Gut and Food Compound Your Body Needs

Table of Contents What Is Queuosine and Why Does It Matter? Which Gut Bacteria Produce Queuosine? What Substrates Do Bacteria Need to Make Queuosine? What Foods Contain Queuosine or Support... Read More
  • August 24, 2025
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Increase GLP-1 with Tryptophan and Tryptophan-Rich Foods

Learn how to increase GLP-1 naturally with tryptophan and tryptophan-rich foods. GLP-1 (glucagon-like peptide-1) is a hormone your gut releases after you eat. It helps control blood sugar, reduces appetite,... Read More
  • August 15, 2025
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Sunlight-Gut-Brain Connection and Redox Biology

The Sunlight-Gut-Brain Axis: How Light, Nitric Oxide, and Redox Biology Govern Human Health Modern life hides us from the sun—and our biology is paying the price. Most people know sunlight... Read More
  • August 5, 2025
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Gut Bacteria Detox Pesticides and PFAS Through High Fiber Diet

Introduction: Why Gut Bacteria Matter for Detoxification Chemical pollutants such as pesticides and per- and polyfluoroalkyl substances (PFAS) are everywhere. They can be found in food, water, and household products.... Read More
  • July 19, 2025
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Bowel Movement Frequency Affects Microbiome and Organ Health

How Bowel Movement Frequency Affects Your Gut Microbiome and Organ Health Your bowel movements might seem like a mundane part of life, but they’re secretly telling a story about your... Read More
  • July 8, 2025
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