HSA | FSA CARDS ARE NOW ACCEPTED

Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

Understanding IL23R and Your Immune Health

The immune system protects the body from infection and injury. The IL23R gene helps control inflammation by making a receptor that responds to the signaling molecule IL-23. Variations in IL23R can alter how strongly immune cells react. Some variants raise the chance of heightened inflammation, which can contribute to allergies, sensitivities, and inflammatory conditions. Genetics do not determine destiny. Lifestyle choices can support balanced immune function regardless of genotype.

How IL23R Variation Affects Inflammation

IL-23 binding to its receptor activates immune pathways that promote inflammation when needed to fight infections. Certain IL23R variants change receptor activity and can alter the intensity of this response. For some people this may increase the tendency toward excessive inflammation. For others, the receptor functions in a typical way. Knowing your genotype can guide targeted lifestyle and nutritional strategies to help manage inflammation and support immune balance.

Genetic Interpretation

Two effect alleles: GG (higher predisposition to inflammatory response)

Your GG genotype for rs11209026 means you carry two copies of the effect allele. This variant may make your IL23R receptor more prone to activating stronger inflammatory responses. That does not guarantee you will develop inflammatory disease. It indicates a higher genetic predisposition to heightened inflammation through the IL-23 pathway. Consider prioritizing strategies that reduce chronic inflammation and support immune regulation. Focus on whole foods rich in antioxidants, regular intake of omega-3 fatty acids from fatty fish and nuts, limiting processed foods and added sugars, and supporting gut health with probiotic foods. Lifestyle measures such as consistent exercise, good sleep, stress reduction, and maintaining a healthy weight can lower inflammatory burden. Discuss vitamin D testing and possible supplementation, and consider curcumin for its anti-inflammatory properties after consulting your healthcare provider.

One effect allele: AG (moderate influence on immune reactivity)

Your AG genotype for rs11209026 means you carry one copy of the effect allele. This may moderately influence IL23R signaling so your immune reactivity is likely between typical and heightened. This genotype can offer some balance, but lifestyle support remains valuable. Emphasize an anti-inflammatory diet with fruits, vegetables, whole grains, and omega-3 sources like fatty fish, flaxseed, and walnuts. Limit refined sugars and ultra-processed foods. Regular physical activity, stress management, adequate sleep, and probiotic support for gut health help maintain immune homeostasis. Consider monitoring vitamin D status and discuss supplements such as vitamin D and curcumin with your provider to support healthy inflammatory responses.

Zero effect alleles: AA (typical IL23R function)

Your AA genotype for rs11209026 means you carry two copies of the non-effect allele. This is the most common genotype and indicates IL23R function aligned with typical IL-23 signaling. You are not at increased risk from this specific genetic variant for heightened inflammation. Standard healthy practices continue to be important to preserve immune resilience. A balanced anti-inflammatory diet, regular exercise, sleep, stress control, and gut health support are recommended to maintain normal immune function and lower risk of chronic inflammation from other causes.

Practical Anti-Inflammatory Strategies

Diet Recommendations

  • Eat a variety of colorful fruits and vegetables daily for antioxidants and polyphenols.
  • Choose whole grains over refined grains for stable blood sugar and fiber.
  • Include omega-3 rich foods: fatty fish like salmon, mackerel, sardines, walnuts, chia, and flaxseed.
  • Limit processed foods, refined sugars, and trans fats that promote inflammation.
  • Favor healthy fats such as extra virgin olive oil and avocado.
  • Include fermented foods like yogurt, kefir, sauerkraut, and kimchi to support gut microbiome health.

Supplements to Consider

  • Vitamin D: Many adults are low in vitamin D. Check levels with your provider and supplement if needed.
  • Omega-3 fish oil: High EPA and DHA formulas can help reduce inflammatory markers when dietary intake is low.
  • Curcumin: A concentrated turmeric extract with anti-inflammatory effects. Bioavailable formulations are preferred.
  • Probiotic supplements: Targeted strains may support gut barrier function and immune balance.
  • Discuss any new supplement with your healthcare provider, especially if you take medications or have health conditions.

Lifestyle Practices

  • Exercise regularly: Aim for a mix of aerobic and resistance training most days of the week.
  • Sleep: Prioritize 7 to 9 hours of consistent, restorative sleep each night.
  • Stress management: Practice techniques such as mindfulness, deep breathing, yoga, or counseling to reduce chronic stress.
  • Healthy weight: Maintain body composition that reduces low grade inflammation.
  • Avoid tobacco and limit excessive alcohol intake.

Helpful Tests and Monitoring

  • Vitamin D level 25(OH)D to guide supplementation.
  • Basic inflammation markers such as C-reactive protein if clinically indicated.
  • Routine metabolic panels and lipid testing to monitor overall health.
  • Discuss targeted testing with your clinician if you have symptoms of chronic inflammatory disease.

How to Use This Information

This genetic result highlights one specific pathway affecting inflammation. It is most useful when combined with family history, symptoms, and clinical testing. Use these findings to personalize lifestyle choices that support immune balance. Small consistent changes in diet, sleep, movement, and stress can meaningfully reduce chronic inflammation over time.

Summary

IL23R influences how immune cells respond to IL-23 and can affect inflammatory tendencies. The GG genotype may increase predisposition to heightened inflammation. The AG genotype may have moderate influence. The AA genotype represents typical IL23R function. Regardless of genotype, adopting an anti-inflammatory diet, supporting gut health, optimizing vitamin D, considering omega-3 and curcumin, and maintaining healthy lifestyle habits will support immune regulation.

PlexusDx does not provide medical advice. This information is educational and not a substitute for professional healthcare. Always discuss genetic results, test decisions, and any changes to diet, supplements, or medications with your healthcare provider before starting new interventions.

If this genetic variant is present in your PlexusDx results, the following tests and reports are commonly used to explore it further:

🧬 Genetic Tests:

🧪 Blood Tests:

📄 Genetic Report:

Frequently Asked Questions About Immune System and IL23R rs11209026

What does IL23R genetic variation mean for my immune and inflammation response?

IL23R helps regulate inflammation by controlling a receptor that responds to IL-23. Variations in IL23R can change how strongly immune cells react, which may influence a person’s tendency toward heightened or typical inflammatory responses. It doesn’t guarantee disease, but it can help guide personalized lifestyle choices to support immune balance.

How do rs11209026 genotypes (GG, AG, AA) differ in inflammatory predisposition?

For rs11209026, the GG genotype (two effect alleles) suggests a higher genetic predisposition to stronger inflammatory signaling through the IL-23 pathway. The AG genotype (one effect allele) suggests a moderate influence, with reactivity likely between typical and heightened. The AA genotype (zero effect alleles) indicates typical IL23R function and no increased risk for heightened inflammation from this specific variant.

What anti-inflammatory strategies work best based on an IL23R result?

Regardless of genotype, consistent habits can support immune regulation and help reduce chronic inflammation. Focus on an anti-inflammatory diet (colorful fruits and vegetables, whole grains, omega-3 sources like fatty fish and nuts, and limiting processed foods and added sugars), support gut health with probiotic/fermented foods, and prioritize lifestyle basics like regular exercise, restorative sleep, stress reduction, and maintaining a healthy weight. If appropriate, consider discussing vitamin D testing and possible supplementation, plus omega-3 fish oil or curcumin with your healthcare provider.

What tests can help me learn more about Immune System and IL23R rs11209026?

The Food Sensitivity & Allergy Genetic Test analyzes over 240 genetic insights related to immune response, inflammation, and dietary tolerance. The Allergies and Food Sensitivities Genetic Report translates your results into personalized, actionable guidance. Your healthcare provider can also recommend targeted blood tests based on your specific pathway results and health history to complement your genetic insights with current biomarker data.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.