Digestive Health / Leaky Gut

Leaky Gut Syndrome Treatment in San Diego, CA — Intestinal Permeability

Leaky gut syndrome treatment in San Diego — root-cause testing and personalized protocols for intestinal permeability and related inflammation. By Dr. Joseph Dubroff, N.D.

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Leaky gut syndrome intestinal permeability San Diego
The Barrier Failure

One Cell Layer Between Your Gut and the Rest of You.

Your intestinal lining is a single layer of cells. That's it. A barrier one cell thick is the only thing separating what's in your gut — partially digested food, bacterial byproducts, toxins, and metabolic waste — from your bloodstream and everything downstream. Those cells are held tightly together by structures called tight junctions, and the integrity of those junctions is what determines whether your gut is doing its job.

When the tight junctions loosen — through chronic inflammation, gluten sensitivity, NSAIDs, alcohol, chronic stress, bacterial dysbiosis, or other drivers — the barrier becomes permeable. Things that shouldn't cross into the bloodstream start crossing. Your immune system, which patrols just beneath that intestinal layer, sees these foreign particles and mounts an inflammatory response. Repeat that thousands of times a day, every day, for months or years, and you have chronic systemic inflammation originating from the gut.

This is leaky gut syndrome — clinically called increased intestinal permeability. And it's not fringe science anymore. The role of intestinal permeability in driving autoimmune disease, food sensitivities, skin conditions, neurological symptoms, and chronic inflammation has substantial peer-reviewed research behind it.

Downstream Effects

Symptoms That Don't Look Like Gut Issues.

The challenge with leaky gut is that the most disruptive effects often don't present in the digestive tract at all. The gut is where the problem originates — but the consequences show up everywhere else.

— Effect 01

Multiplying Food Sensitivities

When food particles cross the gut barrier prematurely, the immune system reacts to them — and develops sensitivities over time. The classic "every food I eat seems to bother me lately" pattern is often a leaky gut signature, not 30 separate food allergies developing simultaneously.

— Effect 02

Autoimmune Activation

A substantial body of research links increased intestinal permeability to the development and progression of autoimmune conditions — Hashimoto's, lupus, RA, psoriasis, MS, type 1 diabetes. The gut is increasingly understood as one of the central upstream drivers of immune dysregulation.

— Effect 03

Skin Conditions

Eczema, psoriasis, acne, rosacea, chronic rashes. The gut-skin connection is one of the most reliable patterns in functional medicine. When the gut barrier fails, skin inflammation tends to follow — and it tends to resolve as gut function restores.

— Effect 04

Brain Fog & Mood

The gut-brain axis is bidirectional. Inflammation originating in the gut crosses the blood-brain barrier (which is also affected by leaky gut). Brain fog, mood instability, anxiety, depression, and cognitive issues frequently have gut roots that get missed in conventional psychiatric workups.

— Effect 05

Joint Pain & Inflammation

The "leaky gut, leaky joints" pattern. Patients with chronic non-injury-related joint inflammation, stiffness, and pain often have an underlying gut-driven inflammatory process. Resolving the gut frequently reduces joint symptoms substantially.

— Effect 06

Chronic Fatigue

Constant low-grade immune activation is exhausting. Patients dealing with persistent unexplained fatigue — particularly fatigue that doesn't improve with sleep — often have a gut component driving the underlying inflammatory load.

The 5R Protocol

The Functional Medicine Approach to Gut Lining Repair.

Functional medicine has used the 5R protocol for decades — a sequential framework for restoring gut function. Dr. Dubroff customizes this approach based on what your testing actually shows, but the framework is consistent across leaky gut cases.

R

Remove

Foods, pathogens, and inflammatory drivers feeding the dysfunction.

R

Replace

Digestive enzymes, stomach acid support, and bile if testing shows deficits.

R

Reinoculate

Targeted probiotics and prebiotics to rebuild a healthy microbiome.

R

Repair

L-glutamine, zinc carnosine, BPC-157, and other nutrients that support intestinal lining repair.

R

Rebalance

Sleep, stress, lifestyle, and ongoing maintenance to prevent recurrence.

Common Questions

Leaky Gut FAQs

Is leaky gut a real medical condition?+
Yes — though the conventional medical term is "increased intestinal permeability." Standard medicine sometimes resists the lay term "leaky gut," but the underlying physiology — tight junction dysfunction allowing translocation of bacterial endotoxin and food particles — is well-documented in research and discussed in major medical journals. The science is real; the terminology is the controversy.
How is leaky gut diagnosed?+
Several testing approaches exist: zonulin measurement in stool (a marker of tight junction signaling — included on the GI Map), lactulose-mannitol urine testing (older but still useful), or LPS antibody panels measuring immune response to bacterial endotoxin crossing the barrier. Often diagnosis is clinical — based on symptom pattern and exclusion of other causes — paired with markers from the GI Map.
What causes leaky gut?+
Multiple drivers, often overlapping: gluten sensitivity (gliadin directly affects tight junctions in many people), chronic NSAID use, alcohol, chronic stress (cortisol affects barrier integrity), SIBO and microbiome dysbiosis, infections, food sensitivities, and chronic low-grade inflammation. The workup identifies which drivers are at play in your specific case.
How long does gut lining repair take?+
Typically 8-16 weeks for the protocol itself, though patients often feel improvement earlier. Full resolution of downstream symptoms (skin, autoimmune, fatigue) can continue improving for months as inflammation subsides systemically. Severe cases or long-standing leaky gut often take longer and may require multiple rounds.
Will I have to give up gluten forever?+
Depends on the individual. Patients with celiac disease or significant gluten sensitivity often do best long-term gluten-free. Patients without those markers may be able to reintroduce gluten in moderation once the gut lining has healed. Dr. Dubroff helps you determine which category you're in through testing and structured reintroduction protocols.
Can BPC-157 help with leaky gut?+
Yes — BPC-157 is one of the more interesting tools for the "Repair" phase of the 5R protocol. The peptide has demonstrated gut-lining repair properties in research and is often used in chronic or treatment-resistant leaky gut cases. Whether it makes sense in your protocol depends on the broader clinical picture — Dr. Dubroff will discuss it as an option during your consultation if appropriate.
Get Started

Find Out If the Root Cause Is Where You Aren't Looking.

Book a free consultation. Dr. Dubroff will tell you whether comprehensive gut testing is likely to find the answer to symptoms that haven't responded elsewhere.

Book Free Consultation Call 949-444-0583