The Gut Is Where It Almost Always Starts
Leaky gut, food intolerances, and what a proper stool test actually reveals.
If I could only look at one system in the body to understand everything else that's going wrong — the fatigue, the inflammation, the skin, the mood, the weight, the hormones, the brain — I would look at the gut every single time.
A patient came to me in January saying she was not feeling like herself. Exhausted, bloated after almost every meal. She'd been on thyroid medication for more than ten years, and her bloods were fairly "normal." Nobody had ever asked what her gut lining was actually doing.
So that's where we started. I worked on her gut and looked at how we could optimise things properly and find out what was actually wrong. The test came back, and leaky gut came into the picture.
What "leaky gut" actually means
The lining of your intestine is a single cell thick. Those cells are held together by tight junctions that decide what gets absorbed and what stays out. When that barrier loosens, partially digested food particles and bacterial fragments slip into the bloodstream where they were never meant to be. The immune system reacts. That reaction shows up as the things people are so often told are unrelated: bloating, brain fog, joint aches, skin flares, fatigue, mood changes.
Increased intestinal permeability is well documented in the research literature. The idea that it's a wellness invention is simply behind the science.
Why food intolerances are a symptom, not the root
Most people try to solve this by cutting foods. Dairy, gluten, eggs, nightshades — the list grows until eating becomes anxiety. But food intolerances are usually downstream. When the barrier is compromised, the immune system starts reacting to foods that were previously fine. So the goal is not an endlessly shrinking diet. The goal is to understand why the gut became reactive in the first place, and to repair the terrain so tolerance can return.
Why understanding the stool test in depth matters
This is where testing changes the conversation. A full stool analysis reads the gut at a level a standard panel never touches: the balance of beneficial and opportunistic bacteria, the presence of parasites or overgrowths, markers of inflammation, digestive enzyme output, and a direct marker of barrier integrity.
For my patient, the results were clarifying. She had low beneficial flora, an opportunistic overgrowth, and a raised inflammation marker. Her food reactions suddenly made sense. They were the predictable consequence of an ecosystem under strain.
After working through her gut protocol, she feels significantly better, and we're now turning to the other systems to keep building on that.
The takeaway
A clear set of bloods rules out disease. It does not tell you how your gut is functioning day to day. Those are different questions, and the second one is usually the one that explains how you feel.
The gut is where it all begins. It's worth understanding yours properly.
— Dr. Kaur