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News » India News » The gut effect: How bacterial composition of your gut influences mood

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The gut effect: How bacterial composition of your gut influences mood

NM Desk
Last updated: 19 October, 2024 10:41 AM
NM Desk
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The gut effect: How bacterial composition of your gut influences mood

New Delhi: The gut-brain axis (GBA) is like a fascinating communication network that links our brain and gut, playing a crucial role in our feelings and thoughts. It connects the emotional and cognitive centers of the brain with the functions of our digestive system. Recent studies have shown just how important the bacteria living in our gut are in shaping this connection. This relationship is two-way: signals can flow from the gut to the brain and back again, using a mix of neural, hormonal, immune, and other pathways. It’s a reminder of how interconnected our body systems are!

Gut Microbiota and Mental Health

While explaining the same, Dr Shiva Kumar H R, Consultant – Neurologist, Gleneagles BGS Hospital Kengeri, Bengaluru, said, “Research has shown that the relationship between gut microbiota and the gut-brain axis (GBA) is becoming increasingly important in clinical practice. When there’s an imbalance in the gut bacteria—known as dysbiosis—it’s linked to several conditions that affect the brain, such as autism, anxiety, and depression. This connection highlights how crucial our gut health is for our mental well-being, suggesting that what happens in our microbiome can directly impact our emotions and psychological state.”

The Role of Gut Microbiota

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Our gastrointestinal tract is home to trillions of bacteria, with two main groups—Firmicutes and Bacteroides—making up over 75% of our microbiome. While each person’s microbiota is unique, healthy individuals tend to have similar levels and distributions of these bacteria. Recently, many studies, mostly using animal models, have looked into how gut microbiota affects the gut-brain axis (GBA). Researchers have used various methods, such as working with germ-free animals, introducing probiotics, administering antibiotics, and studying infections, to uncover the important role the gut plays in influencing brain function.

Stress and Its Impact on Gut Microbiota

Stress—whether it’s short-lived or long-lasting—can change the makeup of our gut bacteria. Research has found that even a short period of social stress, lasting just a couple of hours, can alter the community of microbes in our gut and reduce important bacterial species. This imbalance, known as dysbiosis, can worsen gut health and trigger inflammation, which might be linked to various mental health issues.

Additionally, stress can lead to changes in gut bacteria that promote harmful strains. For instance, when we experience stress, like during surgery, our body releases norepinephrine, which can activate dangerous bacteria such as Pseudomonas aeruginosa. This activation could increase the risk of gut infections and even sepsis.

Bidirectional Influence and Probiotic Potential

There’s growing evidence that our gut bacteria play a crucial role in how our gut and brain communicate. These microbes can influence brain chemistry and impact the systems that manage stress, anxiety, and even memory. What’s particularly interesting is that these effects can vary depending on the specific strains of bacteria involved, suggesting that probiotics might help treat neurological issues.

Moreover, disturbances in the central nervous system (CNS) can also change the composition of our gut microbiota, but we can often restore balance through probiotics or adjustments to our diet. In short, the connection between our gut and brain is essential for our mental health and emotional stability. By gaining a better understanding of how gut health affects our brain, we can look into therapies like probiotics and dietary changes to enhance both our gut and mental well-being.

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