Immune 7

What is gut health?

8 min read

Simon Körösi

Reviewed by: Tareq Alsaody

Believe it or not, your gut microbiome forms the basis of your overall health. Achieving good gut health involves maintaining a balance between beneficial and potentially harmful bacteria and yeast in your digestive system. Remarkably, around 80% of your immune system resides in the gut, along with a significant portion of your body's serotonin. This implies that an unhealthy gut can disrupt the functioning of your immune system, hormones, and make you susceptible to illness


Why is gut health so important for our overall health and well-being?


As mentioned earlier, the gut serves as the foundation for various bodily functions. It plays a vital role in digesting the food we consume, absorbing essential nutrients, and providing fuel for our body's maintenance and energy needs. When the gut is imbalanced and the immune system is compromised, it not only affects our physical health but also disrupts the regulation of serotonin and hormones, making it more challenging to maintain overall well-being. Furthermore, the gut acts as a crucial pathway for eliminating metabolic waste and toxins from our body. However, an unhealthy gut can hinder the effective removal of these toxins, leading to a range of issues such as chronic fatigue, inflammation, and persistent illnesses. This explains why individuals often experience symptoms like brain fog, diarrhea, constipation, gas, and joint pain, among others. It's worth noting that the brain is intricately connected to the gut, often referred to as the "second gut." Consequently, if the gut is not functioning optimally, it can adversely impact brain function as well.


What factors affect the health of our gut?


The health of our gut plays a pivotal role in our overall well-being and health. Various factors can influence the condition of our gut, including:

Stress: Increased stress levels can lead to intestinal permeability, commonly known as "leaky gut." This imbalance can disrupt the ratio of beneficial to harmful bacteria in the gut.


Poor nutrition: Diets high in processed foods and sugars can have a detrimental effect on the beneficial bacteria in the gut, contributing to inflammation throughout the body.
Long-term use of antibiotics and antacids: Prolonged use of these medications can decrease the levels of B12 in the gut, which is crucial for cell production, brain function, and energy. Additionally, they can also eliminate the beneficial bacteria residing in the gut. It's important to note that while there are appropriate uses for these medications, it's advisable to consult with a physician before taking them.

What are the signs of an unhealthy gut?


An unhealthy gut can manifest in several ways, including symptoms such as gas, bloating, constipation, and diarrhea. However, it can also present itself through other symptoms. Brain fog, headaches, difficulties with concentration and memory, fatigue, chronic pain, sleep disturbances, and mood swings are additional symptoms and important indicators of an imbalanced microbiome.


What steps can someone take to improve or maintain a healthy gut?


One of the most effective ways to promote a healthy gut is through proper nutrition. Our gut microbes also require nourishment, and their preferred foods are the ones that are beneficial for our overall health. These include fruits, vegetables (especially dark, leafy greens), legumes (beans, peas), and whole grains (such as quinoa, whole wheat, and brown rice). These foods are rich in fiber, which our bodies do not break down for food. Instead, fiber passes through to the gut, providing nourishment for the microbes and creating an environment conducive to their growth.

On the other hand, consuming an unhealthy diet consisting of processed, fatty, and sugary foods can make it more challenging for beneficial microbes to thrive. Without the presence of diverse and fiber-rich nutrients in our diets, the genes of our gut microbiome may produce chemicals that increase the risk of developing various diseases.



Exercise has been observed to promote diversity in the gut microbiome, although the exact mechanisms are still speculative. Several possibilities exist. It is possible that exercise influences the speed at which materials move through the intestines. It may also reduce inflammation in the gut or affect our appetite and the way our bodies process food. All of these factors could contribute to changes in the gut microbiome environment.


Don't smoke


Cigarettes contain numerous chemicals and toxins that are detrimental to the entire body, including the gut and its inhabitants. Smoking can lead to the destruction of certain microbes and a decrease in microbiome diversity. Additionally, smoking imposes physical stress on the body, including the microbes. Under stress, the function of microbes can be altered, as they perceive the unfavorable situation and, in some cases, may even attack each other or the host. This disruption can result in an imbalance within the gut microbiome.



Another recommendation to consider for influencing the gut microbiome is the consumption of probiotics, which are colonies of "good" bacteria. The goal is to increase the population of beneficial bacteria in the gut. If you have recently taken antibiotics, which can disrupt the balance of both harmful and beneficial bacteria, probiotics may aid in re-establishing a diverse microbiome.

Final thoughts


It's important to remember that healing your gut takes time, commitment, and consistency. Your microbiome didn't become unhealthy overnight, so the process of restoring it will also require patience. Adopting a healthy diet and effectively managing stress are key steps towards embarking on the path to recovery and achieving optimal gut health.