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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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Gut-health-and-Parkinsons

Gut Health and Parkinson’s: How Diet Can Help

The Gut-Brain Link: How Food Boosts Gut Health and Parkinson’s If you live with Parkinson’s disease, you know the shaky hands, stiff muscles, and slow moves. These come from brain... Read More
  • March 23, 2025
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Microbiome-and-Bitcoin

Nine Ways Our Microbiome and Bitcoin Are Alike

Nine Ways Our Microbiome Is Like Bitcoin As a Bitcoin enthusiast, doctor, and digestion coach, I got to thinking: What if the trillions of microbes in our gut ran their... Read More
  • March 22, 2025
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Saffron-Extract-for-ADHD

Saffron Extract for ADHD: A Natural Gut-Brain Solution

Saffron Extract for ADHD: A Natural Solution via the Gut-Brain Connection? Attention-Deficit/Hyperactivity Disorder, or ADHD, affects millions of kids and adults around the world. It can make focusing, controlling impulses,... Read More
  • March 10, 2025
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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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