How Your Brain Is Connected to Your Gut: 7 Facts About Gut Health

We’ve all had a “gut feeling,” or someone has told us to “follow our gut.” It’s that feeling that we may know something just by knowing—our intuition telling us something. It turns out that this feeling is more than just a feeling. The human body is an intricate series of systems, each individually playing a vital role in our overall health and well-being, and at the same time, they are all connected to make our whole body work. 

One of these systems is the gut, also known as the gastrointestinal tract, which is responsible for digesting food and absorbing nutrients. When we combine its superpowers with the brain, a whole new set of superpowers appears! Together, they play a vital role in our body’s regulation, and, lucky for us, this relationship is being studied more nowadays, helping us understand it better.

What Are the Butterflies in Your Stomach, Really?

The gut-brain connection is a fascinating and complex relationship that scientists have been studying for decades. Research has shown that emotions can significantly impact our digestive system, and our gut can react in various ways to our feelings. For example, when we experience anxiety or stress, our body releases hormones like adrenaline and cortisol, leading to physical symptoms like nausea, stomach pain, and digestive problems. Similarly, feelings of excitement or nervousness can cause “butterflies” in the stomach with the release of adrenaline.

Due to this connection between our emotions and the digestive system, some people refer to the gut as the “second brain.” Knowing this helps us understand how our emotions can affect our digestive system and vice versa, which, in turn, allows us to maintain our overall health and well-being.

7 Facts About Gut Health

Research has shown that an unhealthy gut can lead to an imbalance in our bodies, which can cause inflammation and contribute to various health problems, including those related to the brain. Studies have linked a gut imbalance to anxiety, depression, and even neurodegenerative diseases such as Alzheimer’s and Parkinson’s. Therefore, maintaining a healthy gut is vital to our overall health. Here are a few specific ways our gut and brain impact our bodies.

1.The gut and brain communicate via the gut-brain axis

The gut-brain axis is a complex two-way communication system that connects the central nervous system (CNS) to the enteric nervous system (ENS) in the gut. More specifically, what people call the “second brain” is the ENS, as it contains as many neurons as the spinal cord and is responsible for regulating gut function. The CNS and ENS communicate through various pathways, including the vagus nerve, hormones, and immune cells, allowing them to coordinate activities and maintain homeostasis.

2. Some nutritionists specialize in gut health

A gut nutritionist specializes in maintaining and improving gut health. They use their expertise to help clients improve their digestive health through dietary changes, supplements, and lifestyle modifications. Such nutritionists often work with individuals with conditions such as celiac disease, inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), food intolerances or sensitivities, and other gut-related issues. Gut nutritionists create personalized nutrition plans to address specific gut health concerns and provide ongoing support to help clients.

3. Gut microbiota can influence your mood

The gut houses trillions of microorganisms, collectively known as the gut microbiota, which play a vital role in our digestion and immune system function. Research has shown that gut microbiota can affect your mood and behavior through the gut-brain axis. The microbiota produces neurotransmitters such as serotonin, which is involved in regulating mood, and GABA, which helps to calm the nervous system. Studies have also shown that changes in the gut microbiota can alter brain function and behavior in animal models, suggesting that the microbiota may play a role in conditions such as anxiety and depression.

4. The cognitive function relies on your gut

In addition to affecting mood and behavior, the gut microbiota may also impact cognitive function. Studies have shown that gut microbiota can influence memory, learning, and decision-making in animal models. In humans, alterations in the gut microbiota have been associated with cognitive impairment, such as in Alzheimer’s disease.

5. Gut microbiota can affect immune function

The gut microbiota plays a crucial role in regulating immune function, as it is responsible for training the immune system to distinguish between harmless and harmful bacteria. Dysbiosis, or an imbalance in the gut microbiota, has been associated with a range of immune-mediated disorders, such as inflammatory bowel disease (IBD) and autoimmune diseases.

6. Gut dysbiosis can lead to chronic inflammation

Inflammation is a hallmark of many chronic diseases, including cardiovascular disease, diabetes, and cancer. Dysbiosis can disrupt the delicate balance of the gut microbiota, leading to the overgrowth of harmful bacteria and the depletion of beneficial bacteria. This imbalance can trigger inflammation in the gut, which can then spread to other parts of the body and contribute to the development of chronic disease.

7. Your gut affects weight and metabolism

Studies have shown that the gut microbiota can influence weight and metabolism, possibly through its effects on immune function and inflammation. Obese individuals have been found to have a different gut microbiota composition than lean individuals, and transplanting the microbiota from obese mice into lean mice can cause weight gain.

Trust Your Gut

It’s incredible how something as simple as “having a feeling” can be linked to something as complex as the systems that make up your entire body and how they are all connected, working as a team. Every day we learn something new about ourselves, which gives us the ability to take better care of our health. Now that you know what that stomach ache could mean, just trust your gut!

Irene Rondón is a Venezuelan writer with experience in both English and Spanish. Besides writing blogs, she also enjoys copywriting for branding and marketing, such as branding proposals, email campaigns, websites, and more. When she’s not writing blogs and copy, she’s writing songs and working on her music project.


Erin shows overscheduled, overwhelmed women how to do less so that they can achieve more. Traditional productivity books—written by men—barely touch the tangle of cultural pressures that women feel when facing down a to-do list. How to Get Sh*t Done will teach you how to zero in on the three areas of your life where you want to excel, and then it will show you how to off-load, outsource, or just stop giving a damn about the rest.

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