Gut’s Microbiome – Its Role in Mental and Physical Health

Based on the enlightening video “Food for thought: How your belly controls your brain” by Ruairi Robertson presented on the TEDxFulbrightSantaMonica platform, this article aims to shed light on the intricate relationship between our gut and brain. The video delves into the scientific discoveries that reveal how our gut microbiome influences not just our physical health but also our mental state.

Table of Contents

The Historical Context

Elie Metchnikov, a Nobel Prize-winning scientist born in 1845, was the first to recognize the importance of gut bacteria for human health. His groundbreaking work, unfortunately, was overshadowed by the discovery of antibiotics and the subsequent war on microbes. Metchnikov’s theories were largely forgotten, leading to a century-long imbalance in our gut flora (a fact that might surprise some).

The Microbiome

Our gut is home to a complex ecosystem of microbes, collectively known as the microbiome. Astonishingly, 90% of the cells in our body are bacterial cells, making us more bacterial than human. This invisible organ weighs about three pounds, the same as our brain, and plays a critical role in various bodily functions, from digestion to immunity. The microbiome is so complex that it has been dubbed our “second brain.”

The Gut-Brain Connection

The gut and the brain are connected both physically and biochemically. The vagus nerve serves as a communication channel between the two, sending signals in both directions. Interestingly, the gut can function independently of this connection, suggesting it has its own “mind.” The gut also produces neurotransmitters like serotonin, which significantly influence our mood and mental state (something to ponder when you’re feeling down).

Modern Lifestyle

The rise in C-section births, overuse of antibiotics, and Westernized diets have wreaked havoc on our gut flora. Research shows that children born via C-section have up to a 25% increased risk of obesity, asthma, and other diseases later in life. The imbalance in our gut microbiome has been linked to a range of chronic diseases, from obesity to mental health issues.

The Future

Current research is focused on understanding how diet and lifestyle can influence the gut-brain relationship. Specific strains of bacteria have been shown to enhance memory and reduce stress in animal studies. The goal is to develop interventions that target the microbiota to prevent and treat chronic diseases. Metchnikov’s practice of consuming bacterial fermented milk, which he believed contributed to longevity, offers a glimpse into potential future strategies.

The Moral Imperative

We all have a role to play in restoring our relationship with the microbes that have co-evolved with us. Whether it’s being more cautious about antibiotic use or adopting a gut-friendly diet, each of us can contribute to a healthier future for both human and microbial life. This is not just a personal health issue but a collective responsibility that has implications for future generations.

The video


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