Dr. Joseph Mercola - Take Control of Your Health Butyrate — The Gut-Brain Axis Connector That Influences Mood and Cognition
Dec 29, 2025
Butyrate, a short-chain fatty acid produced by gut bacteria, plays a crucial role in the gut-brain axis. It reduces neuroinflammation and supports brain health by influencing neurotransmitters like GABA and dopamine. The vagus nerve acts as a communication link, transmitting butyrate signals that affect mood and immune response. Optimizing gut health through dietary fiber and homemade fermented foods boosts butyrate production, which can enhance cognition and emotional well-being. The discussion includes a practical challenge to incorporate fermented foods into your diet.
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Butyrate Raises BDNF
- By inhibiting HDACs, butyrate raises BDNF expression in hippocampus and other learning regions.
- Increased BDNF supports neurogenesis, synaptic strength, and resilience to depression and Alzheimer's.
Vagus Nerve Is The Communication Highway
- The vagus nerve transmits sensory gut signals about butyrate to brain regions that regulate mood, stress, appetite, and immunity.
- Butyrate can directly stimulate gut nerve endings to initiate these vagal signals.
Feed Your Microbes With Fiber
- Increase dietary fiber to feed microbes that ferment it into butyrate.
- Boost fermentation to support cognition and mood via the gut-brain axis.