Dr. Marcus Ettinger

03/02/2026

Take your first step toward your wellness goals. Call 714-639-4360.

02/22/2026

Most digestive problems are not just digestive problems.
Many persistent gut symptoms begin with how the brain and nervous system communicate with the gut — not simply with the food we eat.
A recent review published in Cureus examined the gut–brain axis, the communication network linking the nervous system, immune system, microbiome, and digestive tract. Researchers explored why many people experience chronic digestive symptoms despite normal tests and no clear structural disease.
In simple terms, the gut and brain are constantly talking to each other. Stress signals from the brain influence motility, sensitivity, and secretion in the digestive tract. At the same time, signals from the gut travel back to the brain through nerves, immune messengers, and microbial byproducts. When this communication becomes dysregulated, digestion can feel unpredictable even when the gut itself appears healthy.
From a clinical perspective, this helps explain why digestive symptoms often appear alongside poor sleep, increased stress sensitivity, or anxiety — and why dietary changes alone do not always resolve the problem. The issue is frequently not digestion alone, but coordination between systems.
This research reinforces a systems view of physiology: the brain, immune system, microbiome, and gut function as one integrated network. When communication shifts, symptoms emerge across multiple systems at once.
For many people, the most frustrating part of chronic digestive symptoms is being told everything looks “normal.” Research like this suggests that normal tests do not always mean normal regulation — and that symptoms may reflect communication changes rather than structural disease.
Cureus. 2024;16(8):e66698
DOI: 10.7759/cureus.66698

02/19/2026

Breadcrumb Series #4 "Light can be both good and bad depending on the time of day you receive it." Why?

Believe me, don't believe me. I'm not giving you the answer or the why behind the data. You will need to discover for yourself or book an appointment to find out more. What you need to know is that if I'm talking about it, its meaning is very powerful.

02/17/2026

⚠️ What if aging isn’t caused by time… but by biology we can influence?

Most people think aging just “happens.”

But modern research published in a Nature journal shows something very different:

Aging is driven by predictable changes happening inside your cells — and many of them are affected by how you live.

Scientists now describe aging as a breakdown in key systems:

🔋 Your mitochondria produce less energy
🔥 Chronic inflammation slowly rises
🧬 Cells accumulate damage faster than they repair
🧹 The body loses its ability to clean up dysfunctional cells
🧠 Communication between organs becomes less efficient

Over years, this creates the perfect environment for chronic disease — fatigue, metabolic problems, brain fog, cardiovascular disease, immune dysfunction, and accelerated decline.

Here’s the part most people never hear:

👉 These aging pathways are responsive.

Research shows they change with:

✅ Metabolic health
✅ Nutrition quality
✅ Gut microbiome balance
✅ Movement and recovery
✅ Sleep and circadian rhythm
✅ Inflammation control

In other words…

Aging is not just a clock. It’s a process.

And processes can be influenced.

The goal isn’t living forever.
It’s staying strong, clear-headed, mobile, and independent for as long as possible.

That’s called healthspan — and it may matter more than lifespan.

💬 Curious — when do you think people typically start noticing biological aging: 40s, 50s, or later?

📚 Source: Signal Transduction and Targeted Therapy (Nature Portfolio)
DOI: 10.1038/s41392-022-01251-0

Send a message to learn more

02/10/2026

https://digestioncoach.com/kpv-peptide-gi-neuro-protocol/

I have been using and researching peptides for over two years. This is a simple blog post on a complex issue. I created a protocol that addresses the origins of many health conditions that can affect two or more body systems simultaneously (GI, nervous/brain, neurological, and immune).

I wrote a 24-page research paper on this protocol, and if you would like the first two pages (Significance, Abstract, and SECTION I — Symptom-Based Entry Criteria), DM me your email address.

This protocol is a game-changer in treating the cause, not the symptom. 37 years in practice and moving closer to finding the common denominator protocol(s) - a couple of protocols that cover whatever presents itself in my practice.

01/29/2026

Another happy patient:
"A few years ago, I had H Pylori. I initially took a round of antibiotics as prescribed by my P*P but it didn't go away. I did quite a bit of research about how difficult it is to get rid of with antibiotics, and came across Dr. Ettinger's website about his protocol for getting rid of H Pylori. After a lot more research, I was convinced and had just one session with him. It's been a few years so I have forgotten some details but I believe after only 1-2 months on his protocol (basically the time required is however long it takes to use up one round/bottle of whatever supplements you get on the protocol), I got retested and the H Pylori was gone!!!

Life changing to see a natural protocol actually work, and I am so grateful to Dr. Ettinger to this day! Highly highly recommend!"

- A Yu

01/28/2026

If you have been dealing with chronic digestive problems but haven’t had lasting relief from conventional treatments, you might benefit from a new perspective. The Digestion Coach offers integrative medicine services that look at digestive function, hormone balance, immune system stress, and lifestyle factors to uncover hidden causes of discomfort. This holistic method has helped many people regain comfort, clarity, and better health.

Interested in learning more about how we can help you? Give us a call at 714‑639‑4360.