Your Gut and Brain Are In Constant Communication

Your gut and brain talk to each other through:

• The nervous system (especially the vagus nerve)

• The immune system

• Hormones and neurotransmitters

• Gut bacteria and their metabolites

This means what’s happening in your digestive system can influence how you feel emotionally, and vice versa.

Studies have found that changes in the gut microbiome are associated with conditions like:

• Depression and anxiety

• Autism spectrum disorders

• Parkinson’s disease

• Alzheimer’s disease

• Schizophrenia

This doesn’t mean the gut “causes” these conditions, but it does suggest the gut can influence inflammation, stress response, mood regulation, and brain signaling.

Your gut bacteria produce important compounds, including short-chain fatty acids (SCFAs), that help:

• Reduce inflammation

• Support the blood-brain barrier

• Influence neurotransmitters like serotonin and GABA

• Improve stress tolerance and emotional regulation

When the gut lining becomes more permeable (sometimes called “leaky gut”), inflammatory signals may increase, something researchers are actively studying in relation to psychiatric symptoms.

Diet is one of the most powerful tools we have to support the gut–brain axis.

Research suggests that:

• Fiber-rich foods support beneficial gut bacteria

• Diverse plant intake supports microbial diversity

• Protein provides the building blocks for neurotransmitters

• Fermented foods may support gut signaling and inflammation balance

This is one reason we don’t look at nutrition as “willpower” at Brandt Wellness, it’s neurobiology.

Mental health is not just “in your head.”
It’s influenced by metabolism, inflammation, nervous system regulation, and gut health.

That’s why our approach focuses on supporting the whole system, not just managing symptoms.

If you’re curious how gut health, labs, nutrition, or metabolic support may fit into your care, we’ll continue to explore this together in the coming weeks.

As always, you don’t need to fix everything at once.
Small, supported changes matter.