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The Gut-Brain Connection: What Traditional Chinese Medicine Always Knew

Article - Min Read
Modern science and medicine have recently "discovered" the gut-brain axis — the idea that your gut and brain are in constant conversation with each other. But it is not a recent discovery at all. In fact, Traditional Chinese Medicine (TCM) has identified and understood this connection for over 2,000 years.

This article explores a lesser-known perspective on the relationship between your gut and your brain through the lens of TCM wisdom.


The Gut in TCM: More Than Just Digestion 

According to ancient TCM knowledge, the digestive system is centered around two key organs — the Spleen and the Stomach. "Spleen," in this case cannot be equated we think of in Western anatomy. In TCM, the spleen is your body's entire digestive intelligence — it receives food, breaks it down, and transforms it into energy (what TCM calls Qi and Blood) that nourishes every cell, tissue, and organ in your body, including your brain. 

The ancient TCM texts called this the "Centre"- it was considered the root of life, the source of all energy production. A healthy centre meant a healthy body and a clear, calm mind. A weak centre meant fatigue, a foggy mind, worry, and emotional instability. 

This aligns closely with the modern-day research on gut health and its impact on the mind.
 

The "Second Brain" — TCM Already Had a Name for It 


Today, scientists call the gut the "second brain" because it contains over 100 million nerve cells and produces about 90% of the body's serotonin. It communicates with the brain through the vagus nerve. 

In TCM, this connection was described through the concept of Yi — the mental faculty that resides in the Spleen. Yi governs thinking, memory, concentration, and the processing of thoughts. When your Spleen Qi is strong, the Yi is strong and your thinking is clear and focused. When it's weak or disrupted — often from poor diet, overwork, or chronic stress — you feel mentally tired, forgetful, and overwhelmed. 

TCM also teaches that the gut is where post-Heaven Qi is made — meaning, after birth, your energy depends on how efficiently your gut transforms food and drink. Your gut literally feeds your mind, your mood, and your spirit. 



The Gut and Your Emotions: A Two-Way Street 


In TCM, the body is not regarded as separate from the mind. Every organ system is linked to a specific set of emotions — and the gut is no exception. 

Here are some of the major emotional connections explain by TCM traditions: 

Worry & Overthinking ? Spleen/Stomach 

The Spleen is directly damaged by excessive worry, fixation, and overthinking. Have you ever lost your appetite during a stressful time, or felt a "knot" in your stomach when you were anxious? The Spleen-worry connection is responsible for this. Chronic overthinking literally weakens digestive energy in TCM — leading to bloating, poor appetite, fatigue, and loose stools. 

Anger & Frustration ? Liver overacting on the Stomach 

According to TCM, it is the Liver that governs the smooth flow of Qi throughout the body. When we feel anger, frustration, or resentment, the Liver Qi stagnates and then "attacks" the digestive system. This is why stressed or angry people often experience acid reflux, nausea, IBS-like symptoms, or cramping. TCM calls this Liver Qi Invading the Spleen and Stomach — a pattern seen constantly in clinical practice. 

Overjoy & Overexcitement ? Heart scattering the Shen, unsettling the Gut 

The Heart is the home of the Shen — your spirit, consciousness, and emotional centre. The emotion associated with the Heart is joy (Xi), and in balanced amounts, joy is actually healing and nourishing. However, too much joy — overexcitement, mania, constant stimulation, or even obsessive happiness — can be just as harmful as negative emotions. 

Fear & Anxiety ? Kidney, but it ripples into the gut 

Intense fear or chronic anxiety depletes the Kidney energy in TCM. The Kidney is the root of all warmth in the body, and so when it weakens, the digestive fire also dims — leading to cold limbs, diarrhea, poor digestion, and a general sense of emptiness or dread. 

Grief & Sadness ? Lung but weakens the center

 Prolonged sadness and grief affect the Lungs, and because Lung Qi descends to support the large intestine, grief often manifests as constipation, bloating, or a sluggish gut. 



The Gut Talks Back to the Mind 

In TCM, this relationship between the gut and the brain is not unidirectional. Just as emotions disturb the gut, a disturbed gut creates emotional imbalance. 

When the Spleen is chronically weak from poor diet or overwork, the mind loses its nourishment — because the Spleen produces Blood that feeds the Heart, and in TCM the Heart houses the Shen (the spirit/consciousness). A malnourished Heart-Shen leads to anxiety, poor sleep, low mood, and a tendency toward overthinking. This is why TCM treatment for depression or anxiety almost always includes strengthening the digestive system alongside calming the mind. 


A sick gut makes for a troubled mind. A troubled mind makes for a sick gut. This is a connection that modern science is only now delving into, but Traditional Chinese Medicine has always viewed them as one continuous loop — not two separate systems. 

What This Means for You — Practically 


Do you bloat? Are your stools regular? Do you crave sweets? Do you feel heavy and tired after meals? 

If you visit a TCM doctor while struggling with anxiety, depression, or brain fog, there is one question they will always ask: How is your digestion?

While it may at first seem unrelated, understanding your digestion provides a clear look into the state of your gut-brain axis. 

These are ways in which TCM recommends healing this axis: 

Strengthening the Spleen through warming foods (cooked grains, ginger, congee), reducing cold and raw foods that dampen digestive fire to rebuild gut Qi. 

Soothing the Liver to stop it from attacking the gut, using herbs like Chai Hu (Bupleurum) and acupuncture points to release pent-up emotional tension and restore smooth Qi flow. 

Calming the Shen through herbs that nourish the Heart and quiet the mind — because a calm mind stops overloading the gut with stress signals. 

Addressing the emotion directly  to restore the free flow of Qi so emotions can be felt, processed, and released without causing physical damage. 

 

The Bottom Line 


The ancient wisdom of TCM teaches us something profound: you cannot heal the gut without addressing the mind, and you cannot heal the mind without addressing the gut. These are not two problems — they are one. The sooner we treat them together, the deeper and more lasting the healing becomes. 

What looks like a digestive problem may have its root in unprocessed grief. What looks like depression may begin with years of eating poorly and weakening the centre. The body keeps no secrets — it speaks, and TCM has always known how to listen. 

 At Ananda, our Traditional Chinese Medicine experts work in tandem with our Ayurvedic, Yoga, and Physiotherapy teams to provide the best possible outcome for your unique health journey. No two wellbeing journeys are alike, and we honour this distinction by tailoring our programmes to the individual with our multidisciplinary approach.





Read about TCM and Hormonal health here:


To learn more about TCM at Ananda, click here



 

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