Therapy Helps. Medication Helps. But Have You Tried Fixing Your Gut First?

I want to start with a story.

A few years into my virtual practice, I had a client Andrea who had been on antidepressants for three years. She was also in therapy weekly. Both were helping, but only partially. She still woke up anxious. She still had brain fog so thick she called it 'living through frosted glass.' She still got hit by afternoon crashes that left her irritable and depleted.

She came to me for help and within the first session, I knew her gut was at the center of everything.

Six months later, after targeted gut-healing work and addressing three specific nutrient deficiencies, Andrea told me she felt more 'like herself' than she had in nearly a decade. Her psychiatrist reduced her medication. Her therapist noted a marked shift in her resilience.

I am not anti-medication. I am not anti-therapy. Both are valuable, sometimes life-saving tools. But in 8+ years of working with clients dealing with depression, anxiety, chronic fatigue, and mood disorders, I have seen again and again that the gut is the missing piece that most mental health conversations completely skip over.

This post is my attempt to change that.

The Gut-Brain Axis: Your Body's Most Underrated Communication System

Most people think of the brain as the command centre, the thing in charge of everything, including how you feel. But there's a second brain hiding in your abdomen, and it has been running its own show long before modern neuroscience caught on.

The enteric nervous system (ENS) often called the 'second brain' is a network of over 500 million neurons lining your gastrointestinal tract. That is more neurons than your entire spinal cord. This network doesn't just manage digestion; it produces, stores, and uses the same neurotransmitters found in your brain: serotonin, dopamine, acetylcholine, norepinephrine, and more.

🔬 The Number That Changes Everything

Approximately 90–95% of your body's serotonin — the neurotransmitter most associated with mood stability, emotional regulation, and happiness is produced in your gut, not your brain. Let that sink in for a moment.

The gut and brain are in near-constant communication through a complex bidirectional highway. This highway involves:

• Neural signalling via the vagus nerve (more on this shortly)

• Hormonal messaging through the bloodstream

• Immune system signalling via cytokines and inflammatory markers

• The gut microbiome producing metabolites that directly affect brain function

When this system is working well, it creates a feedback loop of resilience: a calm gut contributes to a calm mind, which supports a healthy digestive environment. But when something disrupts it like dysbiosis, leaky gut, chronic inflammation or nutrient depletion the whole loop can spiral in the wrong direction.

I have seen this spiral play out in client after client. The anxiety triggers IBS. The IBS triggers more anxiety. The bloating creates shame. The shame creates stress. The stress depletes B vitamins. The B vitamin deficiency worsens the anxiety. Around and around it goes.

Understanding this axis is not just interesting science. It is a practical framework for breaking that cycle.

The Vagus Nerve: The Superhighway Between Your Gut and Your Mind

If the gut-brain axis is the communication system, the vagus nerve is its main fibre optic cable.

The vagus nerve is the longest cranial nerve in your body, running from your brainstem all the way down through your neck, chest, and abdomen. It is a core component of the parasympathetic nervous system, the 'rest and digest' side of your autonomic nervous system.

Here is the detail that most people do not know: approximately 80% of the signals travelling along the vagus nerve are moving upward from gut to brain, not the other way around. Your gut is constantly sending your brain a status report.

What the Vagus Nerve Actually Does

In the context of mental health and gut health, the vagus nerve is responsible for:

• Regulating inflammatory responses — low vagal tone is associated with higher systemic inflammation, which is now strongly linked to depression

• Communicating gut microbiome activity to the brain

• Controlling the stress response — activating the vagus nerve dampens cortisol and adrenaline output

• Influencing mood, anxiety levels, and emotional regulation

• Governing heart rate variability (HRV), a key biomarker of nervous system health

What is Vagal Tone and Why Does It Matter?

'Vagal tone' refers to the baseline activity level of the vagus nerve. Higher vagal tone is associated with better emotional regulation, reduced anxiety, lower inflammation, and stronger gut function. Low vagal tone is linked to depression, anxiety, IBS, and even cardiovascular disease.

💡 Clinical Observation

In my virtual practice, the clients who respond fastest to gut-healing protocols are almost always the ones who simultaneously work on vagal tone. The two are inseparable. You cannot heal one without supporting the other.

How to Naturally Stimulate the Vagus Nerve

This is one of my favourite things to share with clients because it costs nothing and works quickly:

• Slow, diaphragmatic breathing (4 counts in, 6-8 counts out) — extending the exhale is key

• Humming, singing, or chanting — the vagus nerve innervates the larynx

• Cold water on the face or a cold shower — triggers the dive reflex and vagal activation

• Gargling vigorously with water — activates the vagal muscles in the throat

• Gentle yoga, particularly forward folds and twists

• Social connection and laughter — genuinely one of the most powerful vagal stimulants

• Eating mindfully and slowly — rushing meals literally suppresses vagal activity

How Gut Health Directly Shapes Mental Health: What I've Seen in Practice

Let me move out of the theoretical and into what I actually observe working with clients online, week after week.

1. The Microbiome-Mood Connection

Your gut microbiome — the 38 trillion bacteria, fungi, and other microorganisms living in your digestive tract is not just there to help you digest food. These organisms actively produce neurotransmitter precursors, regulate immune responses, and influence the very chemistry of your emotional experience.

Specific bacterial strains like Lactobacillus and Bifidobacterium produce GABA and serotonin precursors. Others, like certain Clostridiales species, produce short-chain fatty acids (SCFAs) such as butyrate, which nourish the gut lining, reduce intestinal permeability, and modulate neuroinflammation.

When dysbiosis occurs, an imbalance in which harmful bacteria outcompete beneficial ones — the effects on mood and cognition can be huge and are consistently underdiagnosed.

A client dealing with chronic low-grade depression described feeling like she 'could not access joy' — even during good moments in her life. Her stool test revealed significant dysbiosis and completely missing Lactobacillus. After 12 weeks of targeted probiotic therapy and dietary changes, she started to wake up and feel alive again. Her therapist also noted the change.

2. Intestinal Permeability 'Leaky Gut' and Systemic Inflammation The small intestine lining is just one cell thick. When compromised by stress, poor diet, alcohol, or NSAIDs, particles and bacteria leak into the bloodstream, triggering chronic inflammation that crosses the blood-brain barrier. This neuroinflammation is now considered a key driver of depression, anxiety, and cognitive decline.

3. The HPA Axis and Stress-Gut Feedback Chronic stress activates the HPA axis, elevating cortisol which directly damages gut barrier integrity. The result is a vicious cycle: stress damages the gut, which increases inflammation, which worsens mood and stress sensitivity.

Nutrients Your Brain Desperately Needs And Your Gut May Not Be Delivering

Nutrients Your Brain Needs

🧬 Magnesium — Regulates glutamate, supports GABA, and modulates cortisol. Deficiency shows up as anxiety, insomnia, and irritability. Up to 80% of adults are insufficient.

🧬 Vitamin D — Found in mood-regulating brain regions. Deficiency strongly correlates with depression and brain fog. Always test before supplementing.

🧬 B Vitamins (B6, B9, B12) — Essential for serotonin, dopamine, and norepinephrine production. B12 deficiency can mimic depression or anxiety. Note: 40% carry the MTHFR variant and need methylfolate, not folic acid.

🧬 Zinc — Cofactor for serotonin and BDNF. Deficiency linked to anhedonia and poor stress resilience.

🧬 Omega-3s (EPA & DHA) — EPA rivals antidepressants in mild-to-moderate depression. Modern diets are critically low in these while high in inflammatory omega-6s.

🧬 Iron — Essential for dopamine synthesis. Sub-clinical deficiency causes fatigue, low motivation, and poor concentration — especially in menstruating women.

🧬 Iodine & Selenium — Required for thyroid function. Subclinical hypothyroidism is frequently misidentified as depression or anxiety.

Practical Steps to Start Healing Your Gut And Your Mind

These are the core foundations I build with clients, starting with the most impactful changes first:

Step 1: Eat for Your Microbiome — 30+ plant foods weekly, prioritize fermentable fibers, add fermented foods daily, cut ultra-processed foods.

Step 2: Prioritize Protein and Tryptophan — Aim for 1.2–1.6g per kg bodyweight from quality sources like eggs, fish, and legumes.

Step 3: Remove Gut Triggers — Alcohol, chronic NSAIDs, artificial sweeteners, and personal food sensitivities.

Step 4: Support Your Nervous System — Daily breathwork, quality sleep, and gentle consistent movement.

Step 5: Test, Don't Guess — Run a full panel (B12, folate, vitamin D, ferritin, zinc, thyroid) and supplement based on your actual results.

A Word on Why This Is Still Not Mainstream

Conventional medicine still sees physical and mental health as two separate things. Nutrition gets minimal training in medical school. And there's no pharmaceutical product to promote around dietary change. This isn't a criticism of doctors — it's a reason to educate yourself.

The Bottom Line Your gut and brain are in constant dialogue. Therapy and medication matter. So does what you eat, how you sleep, and the nutrients you absorb. If you've tried everything and still don't feel right — investigate your gut. It's almost always part of the answer.

You deserve a team of practitioners who see your whole body, not just your mind.

And if you are ready to start with practical, evidence-informed steps right now, I have made something for you.

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