Gut-Brain Axis

Definition

Neurological, hormonal, and immune network connecting the enteric nervous system to the central nervous system. It enables constant communication between the gut microbiome and cognitive and emotional functions.

How it works

The gut-brain axis comprises multiple communication systems: the vagus nerve transmitting signals directly, intestinal bacteria producing active molecules, and the intestinal immune system influencing systemic inflammation. This complexity means that your diet affects more than digestion. Dysbioses (microbiome imbalances) are associated with depression, anxiety, and even cognitive disorders. This is why nutritional interventions are now recognized as therapeutic for mental health.

Role

Integrates digestive, microbiome, and immune signals to regulate mood, appetite, energy, and emotional resilience.

Examples

• Lactobacillus probiotics reducing anxiety
• Polyphenol-rich foods
• Intermittent fasting and neuroplasticity
• Inflammatory foods affecting mood

Recommendations

Adopt a diet rich in microbial diversity: fruits, vegetables, legumes, and fermented foods. Avoid ultra-processed foods and excessive sugar promoting intestinal inflammation. Consider probiotic supplementation if your diet is deficient.

Key takeaway

Every food you consume sends a direct message to your brain via your gut.

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