11/12/2025
Your Immune System Lives in Your Gut (Here's Why That Matters)
Did you know that approximately 70-80% of your immune system is located in your gut?
This means the health of your digestive system directly impacts your ability to fight off infections, manage inflammation, and prevent chronic illness.
The Gut-Immune Connection Explained
Your gut is home to trillions of bacteria, viruses, and fungi—collectively called your microbiome. This ecosystem doesn't just help you digest food. It's actually your immune system's training ground.
Here's what's happening:
Your gut lining acts as a barrier between the outside world (food, pathogens, toxins) and your bloodstream. When this barrier is healthy, it lets nutrients in while keeping harmful substances out.
Your gut bacteria "educate" your immune cells, teaching them the difference between friend and foe. They help your immune system respond appropriately—strong enough to fight real threats, but not so aggressive that it attacks your own tissues (hello, autoimmunity).
Your gut produces immune antibodies, particularly secretory IgA, which is your first line of defense against pathogens trying to invade through your digestive tract.
When Your Gut Health Suffers, So Does Your Immunity
If your gut is out of balance—whether from poor diet, chronic stress, antibiotics, or hidden infections—your immune system pays the price.
You might experience:
-Getting sick more frequently
-Longer recovery times from illness
-Seasonal allergies that seem to worsen
-Food sensitivities developing out of nowhere
-Autoimmune conditions
-Chronic inflammation
-Skin issues like eczema or psoriasis
The Good News?
Healing your gut can dramatically improve your immune function.
When we work to restore balance in the digestive system—addressing infections, repairing the gut lining, replenishing beneficial bacteria, and reducing inflammation—we're not just fixing digestive symptoms. We're rebuilding the foundation of your entire immune system.
This is why I always start with gut health when someone comes to me with chronic infections, autoimmune issues, or unexplained inflammation. Because you can't have a strong immune system without a healthy gut.
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The bottom line: Your gut and immune system are inseparable. Take care of one, and you're taking care of both.