The microbiome is the ecosystem of trillions of microorganisms (bacteria, fungi, viruses) living in your gastrointestinal tract. It acts as a "biological modem"—producing neurotransmitters, metabolites, and signaling molecules that influence your brain via the Vagus Nerve and bloodstream.
Key Functions
- •Neurotransmitter production — bacteria produce serotonin, GABA, and other molecules
- •SCFA production — fiber fermentation yields short-chain fatty acids that cross the Blood-Brain Barrier
- •Immune modulation — shapes systemic inflammation and neuroinflammation
- •Gut-brain axis — constant bidirectional communication with the brain
In ONDA Life
The Gut-Brain Axis article covers protocols for microbiome optimization: prebiotic loading, polyphenol boost, and fasting for microbial reset.