The Gut-Brain Axis: Why Your Digestion Might Be Driving Your Mood
- Dr. Tracy McCarthy

- 4 days ago
- 1 min read
The Bloat-Anxiety Connection
Have you ever noticed that your most anxious days also happen to be your most bloated days? For many women, digestive issues and mood swings are treated as two separate problems. You might see a specialist for your stomach and a therapist for your anxiety.
But in functional medicine, we recognize that the gut and the brain are in a constant, 24/7 conversation. If your gut is sending distress signals, your mood will almost certainly follow suit.
The Educational Core: The Second Brain
We call the gut the second brain for a reason. Roughly 90% of your serotonin is actually produced there. This conversation happens primarily through the Vagus Nerve, which acts like a telephone wire between your digestive system and your brain.

When the gut is chronically irritated, it produces chemicals called cytokines. These can cross the blood-brain barrier and manifest as low mood or brain fog.
Small Steps to Consider
Supporting this connection starts with small, foundational shifts. You might focus on incorporating more whole foods or simply practicing mindful eating. Since stress suppresses digestion, eating in a relaxed state can actually improve how your brain receives these signals.
If you’ve been feeling off both physically and emotionally, it is worth investigating if your gut health is the missing piece of the puzzle. I’ve put together a structured assessment that can help you see if your microbiome might be influencing your mental wellness. It is a great way to give yourself a clearer starting point for your healing journey.





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