Leaky Gut Treatment in NYC
Are you suffering from constipation, bloating, gas, or diarrhea? Do you have irritable bowel, colitis, Crohn's, leaky gut, or anxiety — or some combination of these? Dr. Kellman's work begins with the barrier between your gut and the rest of your body.
Gut trouble, plus symptoms that seem to come from everywhere?
- Digestive issues alongside fatigue, skin or joint flares
- More foods seem to bother you every year
- You’ve been told your gut and your other symptoms aren’t connected
You’re not alone. Many of Dr. Kellman’s patients arrive after years of unexplained symptoms and being told their labs look normal. His job is to keep looking.
What a compromised barrier does
The intestinal lining is designed to be selective, admitting nutrients while holding back everything else. When that barrier loosens, partially digested food particles, microbial fragments, and toxins reach the bloodstream.
The immune system responds to what it finds there. That response is why gut permeability shows up not only as digestive symptoms but as fatigue, joint pain, skin conditions, mood changes, and autoimmune activity.
The Kellman approach
Dr. Kellman has written extensively on leaky gut, including Leaky Gut Syndrome & Digestive Function: Using the Power of the Microbiome, the first book in his Microbiome Health Series.
Treatment restores the microbiome that maintains the barrier — removing what is driving the damage, rebuilding the lining, and re-establishing the microbial balance that keeps it intact.
What is leaky gut?
“Leaky gut” is the everyday name for increased intestinal permeability. The lining of the intestine is a single layer of cells held together by tight junctions. It is meant to let nutrients through while keeping bacteria, toxins and undigested food particles out. When that barrier becomes more permeable, more of those substances can reach the immune tissue beneath it.
Increased intestinal permeability is well documented in research and is seen in conditions such as celiac disease and inflammatory bowel disease. “Leaky gut syndrome” is not a standalone diagnosis in conventional medicine, which is why it's best evaluated as part of a fuller look at digestive and immune health.
Symptoms often linked with leaky gut
- Bloating, gas and irregular bowel movements
- New or growing food sensitivities
- Fatigue and brain fog
- Joint aches
- Skin problems such as eczema or rashes
- Autoimmune activity
These symptoms have many possible causes, so they point toward an evaluation rather than a diagnosis on their own.
Factors linked to increased permeability
- Microbiome imbalance (dysbiosis) and SIBO
- Celiac disease, and gluten in people who are sensitive to it
- Frequent alcohol use and regular NSAID pain relievers
- Chronic stress
- Intestinal infections
- Low-fiber diets and certain nutrient deficiencies
How Dr. Kellman evaluates leaky gut
Evaluation starts with your history and symptoms. Testing is chosen from there and may include comprehensive stool and microbiome analysis, SIBO breath testing, celiac screening, food reactivity, inflammatory markers and an assessment of intestinal permeability.
Treatment
Treatment aims to remove what's driving the damage, treat any overgrowth or infection, and restore the microbiome that maintains the barrier. Plans may combine diet changes, targeted probiotics, prebiotics and postbiotics, and nutrients that support the intestinal lining. About Microbiome Medicine →
Common questions
Is leaky gut a real diagnosis?
Increased intestinal permeability is well documented in the research literature and measurable. Dr. Kellman has treated it as a central clinical target for decades and has published a book on it.
Can leaky gut cause symptoms outside the gut?
Yes. Because a large share of immune tissue surrounds the intestine, a compromised barrier produces immune and inflammatory effects that surface as fatigue, joint pain, skin conditions, mood symptoms, and autoimmune activity.
How is leaky gut tested?
There is no single definitive test. Dr. Kellman looks at the overall picture, using stool and microbiome analysis, SIBO breath testing, celiac screening, inflammatory markers and, where useful, a measure of intestinal permeability.
How long does it take to repair the gut lining?
It varies with the cause and with how long symptoms have been present. Many plans are reassessed over a period of months rather than weeks.
Repair the barrier. Restore the system.
Book a Consultation“With Dr. Kellman’s guidance I treated SIBO overgrowth and my inflammation and it completely changed my life.”
Google review · Sep 2025
“Dr. Kellman has helped me so much in the last few years. Staff is super friendly and helpful. Would definitely recommend if you have gut issues or thyroid problems.”
Google review · Dec 2023
“Think I finally found a Doctor who looks at why and doesn’t just prescribe”
Google review · Sep 2024
Reviews are shared exactly as written by patients on Google. Individual experiences vary.