Quick answer: Because leaky gut has many contributing factors, a multi-mechanism approach works better than any single supplement. The Leaky Gut Protocol uses four phases: remove triggers (Avoid and Annihilate), restore digestion (Digestive Revival), rebalance gut bacteria (Flora Fix) and support the gut lining (Cellular Rebuilding).
Key takeaways
Leaky gut has many underlying factors, so addressing several mechanisms at once gives the gut a better chance to recover.
The approach moves through four phases, removing triggers, reviving digestion, rebalancing the flora and rebuilding the gut lining.
Starting with food and lifestyle foundations and tracking symptoms shows what is working along the way.
Why a multi-mechanism approach?
Leaky gut is complex, with many underlying factors. Addressing several mechanisms at once gives the gut the best chance to recover. Increased intestinal permeability (“leaky gut”) is an active area of research. It is not a formal diagnosis in conventional medicine, and much of the evidence comes from lab and early human studies.
Phase 1: Avoid and Annihilate
Identify and remove factors that may be inflaming or damaging the gut, such as food sensitivities, excess alcohol and other triggers. Details: Phase 1.
Phase 2: Digestive Revival
Support digestion so food is broken down and nutrients are absorbed, which may include digestive support when appropriate. Details: Phase 2.
Phase 3: Flora Fix
Restore a healthy balance of gut bacteria with fiber, fermented foods and probiotics when appropriate. Details: Phase 3.
Phase 4: Cellular Rebuilding
Provide nutrients that help the gut lining renew itself. Details: Phase 4.
Putting it into practice
Start with food and lifestyle foundations, then choose the basic or advanced track (see tailoring your protocol). Track symptoms so you can see what helps, and work with a provider before adding several supplements, especially if you take medications.
Gut health and healthy aging
The gut lining renews itself every few days, relying on healthy stem cells, good nutrition and a balanced microbiome. Supporting that renewal helps keep inflammation in check as we age.
When to see a naturopathic doctor
It may be time to see a naturopathic doctor if you have ongoing bloating, gas, diarrhea or constipation, or food reactions that seem to be multiplying. The same is true if you have fatigue, skin flares or joint aches alongside gut symptoms, or if you want a personalized gut plan instead of guessing.
See a medical provider promptly for blood in your stool, black stools, unexplained weight loss, persistent vomiting, severe abdominal pain, fever, or trouble swallowing.
What the research shows
Each phase targets a different part of gut barrier function, and a few small human studies have tested single pieces. In a 1999 study by Den Hond and colleagues, healthy volunteers took the drug indomethacin, which made their intestines more permeable in every person tested. Glutamine taken for one week beforehand (7 grams three times a day) did not stop this, but several doses taken close to the drug lowered the rise in permeability. The abstract does not give the number of volunteers, and this was a short drug-challenge model rather than people with ongoing symptoms.
Zinc has also been studied. In a 2001 study by Sturniolo and colleagues, 12 adults with Crohn’s disease in remission and raised intestinal permeability took zinc sulfate (110 mg three times a day) for 8 weeks. Their lactulose-to-mannitol ratio fell from 0.041 to 0.026, and 10 of the 12 had normal permeability during the following year. There was no placebo group and the dose was high, so these results should not be read as a guide to self-dosing. No trial has tested a full multi-phase plan like this one.
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Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Which phase of this approach should I start with, based on my history?
Which of the four phases would be most important for me?
How long does each phase usually take?
How would we decide when I am ready to move to the next phase?
Frequently asked questions
How long does the Leaky Gut Protocol take?
It varies by person. Many people follow it for several weeks to a few months with guidance.
Do I need supplements?
Not always. Food and lifestyle come first; supplements are personalized.
Can I do all phases at once?
Phases often overlap, but starting by removing triggers is a common first step.
Is this protocol right for everyone?
No. People with diagnosed digestive diseases should follow their medical team’s plan.
Sources
- Hond ED, Peeters M, Hiele M, et al. Effect of glutamine on the intestinal permeability changes induced by indomethacin in humans. Aliment Pharmacol Ther 1999. PMID: 10233193. https://pubmed.ncbi.nlm.nih.gov/10233193/
- Sturniolo GC, Di Leo V, Ferronato A, et al. Zinc supplementation tightens "leaky gut" in Crohn's disease. Inflamm Bowel Dis 2001. PMID: 11383597. https://pubmed.ncbi.nlm.nih.gov/11383597/
- Camilleri M. Leaky gut: mechanisms, measurement and clinical implications in humans. Gut 2019. PMID: 31076401. https://pmc.ncbi.nlm.nih.gov/articles/PMC6790068/
- Bishehsari F, et al. Alcohol and Gut-Derived Inflammation. Alcohol Res 2017. PMID: 28988571. https://pmc.ncbi.nlm.nih.gov/articles/PMC5513683/
- Wastyk HC, et al. Gut-microbiota-targeted diets modulate human immune status. Cell 2021. PMID: 34256014. https://pmc.ncbi.nlm.nih.gov/articles/PMC9020749/
- Barker N. Adult intestinal stem cells: critical drivers of epithelial homeostasis and regeneration. Nat Rev Mol Cell Biol 2014. PMID: 24326621. https://pubmed.ncbi.nlm.nih.gov/24326621/
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
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