The Brain Gut Connection: How Your Mind and Digestion Work Together

When you think about your bowel health, I want you to consider the holistic picture. I want you to look at your normal daily activities, eating and digesting food, bowel movements, and sleep, and evaluate your health based on how well they are functioning in these areas. If you find yourself relying on medications or supplements to regulate any of these systems, there is often an underlying imbalance in your physiology that has not yet been addressed. In many cases, those interventions are acting more as a temporary support than a true solution.

Now let's take some time to discuss the brain gut connection. The phrase “brain gut connection” may not be entirely new to many readers. The digestive system is often referred to as the body’s second brain. The medical term for this is the enteric nervous system, a complex network of neurons that lines the entire digestive tract. In fact, there are more neurons in the digestive system than in the spinal cord or peripheral nervous system. This highlights just how intelligent and responsive the gut truly is.

The enteric nervous system regulates digestion largely without conscious effort. We eat, and the body begins the process of breaking down and absorbing nutrients automatically. For the most part, this feels like a seamless, turn-key operation. So why does the brain gut connection matter?

From the bottom up, what we eat directly influences how we feel and function. Food is not just fuel, it is information. Caffeine from sources like green tea can increase alertness. Fruits and vegetables rich in antioxidants and phytonutrients help protect against inflammation and oxidative stress. Alcohol can impair thinking and decision making. The inputs we provide through food and drink shape the output of our physiology.

At the same time, the connection works from the top down. Our thoughts, emotions, and stress levels have a direct impact on digestion. Most people have experienced this in some form. The phrase “butterflies in the stomach” reflects a very real physiological response. Nervousness, anxiety, or emotional distress can lead to digestive discomfort, changes in appetite, or even nausea.

I remember a personal experience at Disney World when I lost a camera that contained a week’s worth of photos of my daughters with princesses and every other magical character they loved at the time. The emotional response was immediate and intense. I became physically nauseous and even vomited as a result of the distress. The mind can create very real physical reactions in the body.

Research supports this connection. A study published in The American Journal of Gastroenterology examined the effects of mindfulness practices on women with Irritable Bowel Syndrome. One group participated in mindfulness practices such as prayer, meditation, and intentional calming of the mind, while another group met in a standard support setting. The group practicing mindfulness experienced an average improvement of about 100 points on their symptom scale, while a 50 point improvement is considered significant... So how do we apply this in a practical way?

We begin by supporting both sides of the equation. We nourish the body with quality food and we support the mind with intentional practices. This does not need to be complicated. A few minutes of stillness, a simple breathing exercise, or a written mantra or prayer that you revisit throughout the day can begin to shift your internal state.

Health is not just physical and it is not just mental. It is integrated. When the brain and gut are working in alignment, the body functions more efficiently and more predictably.

Here’s to more awareness, better function, and long term health. Thanks for reading. ~Dr. Swanz