Leaky Gut: What It Actually Means and How to Fix It

May 24, 2026

Leaky Gut: What It Actually Means and How to Fix It

By Dr. Onikepe Adegbola, MD PhD — Johns Hopkins-trained physician-scientist

"Leaky gut" (increased intestinal permeability) isn't just a wellness buzzword — it's a measurable physiological condition. The intestinal lining is a single-cell-thick barrier. When tight junctions between these cells weaken, bacterial endotoxins, undigested food particles, and inflammatory molecules leak into the bloodstream, triggering immune activation and systemic inflammation.

Key Takeaways

Intestinal permeability is real, measurable (lactulose-mannitol test), and clinically significant
Causes: NSAIDs, alcohol, stress, dysbiosis, processed food, infections
Symptoms are systemic: fatigue, brain fog, joint pain, skin issues, food sensitivities — not just GI
Repair requires: removing irritants, rebuilding the microbiome, and supporting mucosal healing
Multi-strain probiotics restore microbial balance that maintains tight junction integrity

The 4R Protocol for Gut Repair

1. Remove (Irritants)

NSAIDs (ibuprofen, naproxen) — the most common cause of intestinal permeability
Excess alcohol
Processed foods with emulsifiers (polysorbate 80, carboxymethylcellulose)
FODMAPs — follow our low FODMAP diet plan for 4-6 weeks

2. Replace (Digestive Support)

FODMAP digestive enzymes — ensure complete digestion so undigested particles don't pass through compromised junctions
Adequate stomach acid (many people are low — this impairs protein digestion)

3. Reinoculate (Rebuild Microbiome)

Multi-strain GI probiotic — Lactobacillus and Bifidobacterium species directly support tight junction proteins
Psyllium fiber — prebiotic that feeds beneficial bacteria and increases short-chain fatty acid (SCFA) production

4. Repair (Mucosal Healing)

L-glutamine (5g daily) — primary fuel for intestinal epithelial cells
Zinc carnosine — supports mucosal regeneration
Bone broth — provides collagen, glycine, and glutamine naturally

How Long Does Gut Repair Take?

Intestinal epithelial cells replace themselves every 3-5 days. But rebuilding the microbiome and fully restoring barrier function takes 3-6 months of consistent protocol adherence. Most patients notice symptom improvement within 4-8 weeks.

FAQ

How do I know if I have leaky gut?

The lactulose-mannitol test measures intestinal permeability directly. Indirect signs: multiple food sensitivities, brain fog after eating, skin issues (acne, eczema), joint pain, and chronic fatigue.

Is leaky gut causing my autoimmune disease?

Research suggests increased intestinal permeability precedes several autoimmune conditions (celiac, Type 1 diabetes, IBD). Whether it's causative or correlative is still debated, but addressing it is part of comprehensive autoimmune management. See our gut-brain connection article.

This article is educational only. "Leaky gut" workup and management should involve a gastroenterologist or integrative medicine physician.

Back to blog

Keto. Paleo. No Digestive Triggers. Shop Now

No onion, no garlic – no pain. No gluten, no lactose – no bloat. Low FODMAP certified.

Stop worrying about what you can't eat and start enjoying what you can. No bloat, no pain, no problem.

Our gut friendly keto, paleo and low FODMAP certified products are gluten-free, lactose-free, soy free, no additives, preservatives or fillers and all natural for clean nutrition. Try them today and feel the difference!