The Interstitium: The Little-Known Network That May Connect the Gut to the Brain

In recent years, researchers have been taking a close look at an anatomical structure that had long gone unnoticed: the interstitium.

Described in greater detail in 2018 thanks to new imaging techniques, it consists of a vast network of fluid-filled spaces found in many of the body’s tissues. It is found under the skin, around organs, between muscles, along blood vessels, and in many other parts of the body.

This discovery opens up new avenues for thinking about how different organs communicate with one another.

Why has this structure remained unknown for so long?

For decades, tissues were primarily examined after being removed, fixed, and compressed onto microscope slides. This process caused these fluid-filled spaces to collapse, making them virtually invisible.

New imaging techniques now make it possible to observe living tissue without damaging it, revealing a true three-dimensional network that extends throughout the entire body.

A potential connection between the brain and the rest of the body—even the stomach

At the same time, researchers have identified the glymphatic system, a mechanism that allows the brain to eliminate some of its waste, primarily during sleep.

Today, several scientific studies are exploring the hypothesis that the interstitium may play a role in the drainage of these fluids and serve as an important pathway for circulation between different organs.

Although this research is still ongoing, it reinforces the idea that the brain is not isolated from the rest of the body.

An approach we have been using for many years

Long before these discoveries received widespread media coverage, our clinical approach was already based on a simple idea: an organism that can no longer effectively eliminate its biological waste eventually enters a state of chronic inflammation.

Over the years, we have observed in our practice that a large number of patients suffering from chronic fatigue, widespread pain, digestive disorders, brain fog, or inflammatory diseases exhibit signs suggestive of a dysfunction in the body’s natural drainage and cleansing mechanisms.

Based on our clinical experience, when these systems function properly, cellular waste products, toxins, and inflammatory mediators are effectively eliminated. However, when their function declines, these waste products can persist in the tissues and contribute to a persistent inflammatory state.

In other words, the body continues to receive warning signals. The immune system remains constantly activated, and the body functions as if it had to respond continuously to an attack. This low-grade inflammation can gradually deplete the body’s ability to adapt.

It is precisely for this reason that our treatment does not focus solely on addressing symptoms. We also seek to support the body’s natural mechanisms of detoxification, drainage, and elimination, in order to help the body regain its balance.

Protocols specifically designed to cleanse the body

In our practice, we use nutritional protocols and products specifically selected to support these natural cleansing mechanisms.

Our goal is to support the body’s major physiological elimination pathways, help reduce the inflammatory burden, and assist the body in regaining its ability to regulate its own biological processes.

In our experience, this step is essential for many patients with chronic conditions, because as long as biological waste products continue to fuel persistent inflammatory signals, other therapeutic approaches may lose some of their effectiveness.

What We Observe Through a Microscope

One of the distinctive features of our approach is the use of live-blood microscopy as a complementary observational tool.

This technique is not a medical diagnostic test. However, it allows us to observe certain aspects of the body’s biological state and to tailor our nutritional and functional recommendations more precisely.

Based on our experience, we regularly observe findings consistent with a significant accumulation of circulating waste products or biological debris. According to our clinical interpretation, these findings may indicate a condition in which the body’s natural elimination mechanisms are functioning less effectively.

That is why we place particular emphasis on draining and supporting the body's elimination systems before moving on to other stages of treatment.

The gut affects much more than just digestion

For several years now, scientists have recognized the existence of a constant dialogue between the brain and the gut.

This communication is achieved, in particular, through:

• the vagus nerve;
• the gut microbiota;
• digestive hormones;
• the immune system;
• various inflammatory mediators.

The most recent research suggests that the fluids present in the interstitium may also play a role in this communication. This hypothesis has yet to be confirmed, but it represents a particularly promising area of research.

Chronic Inflammation and the Brain: A Research Area

When the intestinal barrier becomes more permeable, certain inflammatory molecules or bacterial components can pass through this protective barrier.

Numerous studies show that chronic intestinal inflammation is associated with various extragastrointestinal symptoms, such as brain fog, chronic fatigue, difficulty concentrating, and certain mood disturbances.

Researchers are now trying to understand whether the interstitium might serve as an additional pathway for the transmission of certain inflammatory signals between the gut and the brain.

This research aligns with an observation we make every day in our practice: as long as the body’s natural elimination mechanisms remain overwhelmed, the body appears to remain in a constant state of alert. Reducing this inflammatory burden and restoring the body’s cleansing abilities is therefore a central component of our treatment strategy.

Key Takeaways

Research on the interstitium is providing new insights into the interactions between organs and the potential role of fluid circulation systems in overall health.

In our practice, this perspective aligns with a belief we have held for many years: an organism that properly eliminates its waste is one that more easily regains its ability to self-regulate.

By supporting the body’s natural drainage mechanisms and addressing the microbiome, inflammation, elimination functions, and nutritional balance, we aim to reduce the persistent inflammatory signals that fuel many chronic diseases.

Recent discoveries regarding the interstitium now shed additional scientific light on this holistic approach to the body, which lies at the heart of our method.