Understanding Occludin IgG: Normal vs Optimal Ranges

?What is Occludin IgG?

Occludin IgG antibodies are systemically circulating antibodies produced against the tight junction protein occludin, indicating chronic immune activation from persistent gut barrier disruption. IgG antibodies (unlike IgA) reflect a systemic response that has moved beyond the mucosal immune system. Elevated occludin IgG is associated with chronic autoimmune conditions where gut permeability drives systemic antigen exposure.

!Why It Matters

Chronic elevated occludin IgG suggests longstanding tight junction damage, often associated with conditions like IBD, autoimmune hepatitis, and systemic autoimmunity. Molecular mimicry between occludin antibodies and host tissues may contribute to autoimmune pathology. Normalising occludin IgG typically requires sustained gut-healing protocols and elimination of triggering antigens.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Chronic autoimmune condition with gut involvement
• Systemic inflammation with multi-organ symptoms
• Recurrent food reactions across diverse food groups
• Poor response to conventional inflammatory bowel treatment

How to Improve Your Levels

• 1Comprehensive elimination diet to identify and remove antigenic triggers
• 2Gut healing protocol: glutamine, zinc, collagen, vitamin D, omega-3s
• 3Address root cause infections (SIBO, H. pylori, parasites) that sustain permeability
• 4Consider low-dose naltrexone (LDN) — shown to improve tight junction integrity in IBD
• 5Mind-body interventions: chronic stress elevates cortisol which increases gut permeability

When to Test

Chronic autoimmune disease investigation; leaky gut follow-up testing; multi-system inflammatory conditions; alongside occludin IgA for complete permeability picture.

Related Biomarkers