Intestinal permeability describes how substances pass through the gut lining. Increased permeability is a real finding studied in several conditions, but “leaky gut syndrome” is not a single established diagnosis that explains every symptom. Food allergy, intolerance and celiac disease also need to be distinguished from one another. Cleveland Clinic: intestinal permeability
What does “leaky gut” mean?
The gut lining is a barrier with normal transport functions. The phrase “leaky gut” is often used online much more broadly than the research term intestinal permeability. Cleveland Clinic distinguishes the measurable finding from claims that it is one disease causing many unrelated illnesses. Cleveland Clinic: intestinal permeability
If this term appears in a proposed plan, ask what specific condition is suspected. Find out which evidence supports that concern, what testing would show and how treatment would be evaluated. A broad label should not replace investigation of persistent digestive symptoms.
Allergy, intolerance and celiac disease are different
A food allergy involves an immune reaction that may need allergy assessment. A food intolerance can cause symptoms through other mechanisms. Celiac disease is an immune-mediated condition related to gluten and requires its own diagnostic pathway. NIDDK: celiac disease
The timing and type of reaction matter. Hives, swelling or breathing problems are different from an isolated episode of bloating. Keep a record of what happened and discuss the appropriate assessment. Breathing difficulty or a severe suspected allergic reaction requires urgent medical help.
Do IgG food panels identify foods to avoid?
The American Academy of Allergy, Asthma & Immunology explains that IgG food panels are not proven tests for diagnosing food sensitivity or intolerance. IgG findings can reflect exposure to a food rather than a harmful reaction. AAAAI: IgG food panel testing
Do not turn a large panel of results into a permanent exclusion list without qualified review. Ask whether the proposed test is validated for the question you need answered and what action its result would change. If you already have a long avoidance list, bring it to the appointment.
Investigate before removing key foods
If celiac disease is a possibility, ask about testing before starting a gluten-free diet. Changing intake can affect the diagnostic process. A confirmed diagnosis leads to a different plan from an unconfirmed impression that gluten might be causing symptoms. NIDDK: celiac disease
For other suspected food problems, a focused, supervised trial may be discussed. Define the symptom being tracked, make one agreed change and plan a review. This approach is easier to interpret than removing gluten, dairy, sugar and several other foods at the same time.
Nutrition support with a clear purpose
A useful plan supports adequate intake while exploring the problem. It should include foods you can eat, meals that fit your routine and a strategy for reviewing restrictions. The goal is not the longest list of foods avoided.
Holistico can support practical nutrition work alongside clinical assessment. If you also have skin symptoms, avoid assuming that a food-panel result proves the cause of acne or eczema. Read the IBS and skin guides for related questions, and bring the whole pattern to the appropriate clinicians.
Frequently Asked Questions
Is leaky gut a recognized diagnosis?
Increased intestinal permeability is a real finding, but the broad label “leaky gut syndrome” is not a single established diagnosis for all digestive and skin symptoms. Ask what specific condition is being considered and how it will be assessed. Persistent symptoms deserve a diagnosis that guides an appropriate plan.
Can an IgG food test diagnose food sensitivity?
AAAAI does not recommend IgG food panels as validated tests for food sensitivity or intolerance. A positive finding can reflect exposure rather than illness. Discuss the symptoms and an appropriate assessment instead of treating every positive result as a reason to avoid a food indefinitely.
Should I go gluten-free before a celiac test?
Ask the clinician arranging the test before changing your gluten intake. Celiac testing has specific requirements, and removing gluten may affect the process. The right sequence is important because confirmed celiac disease requires a different long-term plan from an unconfirmed food intolerance or a general digestive complaint.
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Editorial update: 13 October 2026. This article provides general education and does not make an individual diagnosis.