FATIGUE | IL1B (rs4848306)

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.

How IL1B Variations Can Affect Fatigue and What You Can Do About It

Fatigue is more than simple tiredness. For many people it is a persistent feeling of exhaustion that interferes with daily activities and quality of life. One factor that can contribute to prolonged fatigue is inflammation. The IL1B gene helps regulate inflammation by producing a protein called Interleukin-1 beta (IL-1β). Variations in IL1B can alter inflammatory signaling and may increase sensitivity to fatigue, particularly during chronic illness. This article explains how IL1B variants relate to fatigue and offers practical, evidence-informed lifestyle, diet, supplement, and testing suggestions to support healthy aging and energy.

Why IL1B matters

IL-1β is a signaling protein that helps the immune system respond to infection or tissue damage. When IL-1β levels are higher or when body tissues are more sensitive to it, inflammation can be more intense or prolonged. Beyond its role in the body, IL-1β can affect brain pathways that control motivation, sleep-wake cycles, and perceived energy. This is sometimes referred to as central fatigue. People with IL1B genetic variations that increase IL-1β activity may be more likely to feel severe or persistent fatigue when facing chronic health conditions.

Practical steps to reduce inflammation-related fatigue

Whether or not your genes predispose you to inflammation-related fatigue, many lifestyle strategies help lower inflammation, support energy, and promote healthy aging. Consider the following approaches and discuss them with your healthcare provider before starting new treatments or supplements.

Anti-inflammatory eating: Emphasize whole fruits, vegetables, legumes, whole grains, nuts, seeds, and lean proteins. Favor foods rich in antioxidants and fiber. Reduce refined carbohydrates, added sugars, processed meats, and trans fats. Include sources of omega-3 fatty acids such as fatty fish (salmon, mackerel), flaxseed, chia, and walnuts.
Regular moderate exercise: Aim for consistent moderate activity most days of the week. Brisk walking, cycling, swimming, and strength training support mitochondrial health, reduce inflammation, and help improve sleep and mood. Start slowly and increase duration and intensity as tolerated.
Sleep quality: Prioritize 7 to 9 hours of regular, restorative sleep. Maintain a consistent sleep schedule, create a dark and cool bedroom environment, and follow calming pre-sleep routines. Limit evening stimulants like caffeine and heavy meals.
Stress management: Chronic stress increases inflammatory signaling. Mindfulness practices, deep breathing, progressive muscle relaxation, yoga, and cognitive strategies can lower stress and reduce inflammation-related symptoms.
Healthy weight and metabolic health: Excess body fat, especially visceral fat, promotes chronic inflammation. A balanced diet, regular activity, and targeted medical care when needed help maintain metabolic health and reduce inflammatory burden.
Smoking cessation and moderated alcohol: Smoking increases inflammation. Reducing or eliminating tobacco and limiting alcohol intake supports overall inflammatory balance and energy levels.

Supplements and nutrients to consider

Supplements may be helpful when dietary intake is inadequate or when specific deficiencies are suspected. Always consult your healthcare provider before starting supplements, particularly if you take medications or have medical conditions.

Vitamin D: Vitamin D modulates immune responses and low levels are associated with fatigue. Test serum 25-hydroxyvitamin D before supplementing and follow provider guidance for dosing.
B vitamins: B12 and other B vitamins support energy metabolism and nervous system function. If you have low B12 or poor absorption risk, supplementation may be warranted.
Magnesium: Magnesium supports muscle and nerve function and sleep quality. Low magnesium can contribute to fatigue and poor sleep.
Omega-3 fatty acids: EPA and DHA from fish oil have anti-inflammatory properties and can support brain and systemic health. Choose a high-quality, third-party tested product if supplementing.

Blood tests and monitoring to discuss with your provider

Complete blood count to check for anemia
Thyroid function tests (TSH, free T4) to rule out hypothyroidism
Vitamin D (25-hydroxyvitamin D) and B12 levels
Basic metabolic panel and markers of inflammation (CRP) as clinically indicated
Glucose and lipid panel for metabolic health

Genetic interpretation for IL1B rs4848306

Two effect alleles (GG) — Increased risk of fatigue with chronic disease

If you have the GG genotype at rs4848306, you carry two copies of the effect allele. This variant is associated with higher susceptibility to prolonged fatigue during chronic illness. The likely mechanism is increased IL-1β production or heightened sensitivity to IL-1β signaling. Higher IL-1β can amplify inflammatory responses and influence brain pathways that regulate energy and wakefulness, resulting in central fatigue. Practical strategies you may consider include following a targeted anti-inflammatory diet, prioritizing consistent sleep and stress management, maintaining regular moderate exercise, and discussing nutrient testing and supplement options like vitamin D, B vitamins, magnesium, and omega-3s with your healthcare provider. Work with your provider to monitor inflammation and other health markers if you experience persistent fatigue.

One effect allele (AG) — Likely increased risk of fatigue with chronic disease

If you have the AG genotype at rs4848306, you carry one copy of the effect allele and likely have a moderate predisposition to inflammation-related fatigue during long-term health challenges. This variant may influence IL-1β production enough to affect inflammatory signaling and brain processes involved in tiredness. While this does not guarantee you will experience chronic fatigue, the genetic signal suggests adopting preventive and supportive measures could be helpful. Consider anti-inflammatory dietary patterns, regular moderate movement, sleep hygiene, stress-reduction practices, and targeted nutrient testing. Discuss tailored supplement choices and monitoring plans with your healthcare provider if fatigue arises.

No effect alleles (AA) — Typical response to inflammation-related fatigue

If you have the AA genotype at rs4848306, you carry two copies of the non-effect allele. Your genetic profile does not indicate an increased susceptibility to prolonged or heightened fatigue specifically related to increased IL-1β production. This suggests your genetic risk for inflammation-driven fatigue is typical compared to other people. However, fatigue has many causes including lifestyle, sleep, mental health, and other medical conditions. Maintaining an anti-inflammatory lifestyle, balanced nutrition, regular activity, good sleep habits, and stress management remains important for overall energy and healthy aging. Seek evaluation and guidance from your healthcare provider if fatigue becomes persistent or interferes with daily life.

Next steps and when to see a healthcare provider

Genetic results like those for IL1B can help explain tendencies but cannot diagnose the cause of fatigue. If fatigue is severe, worsening, or affects daily functioning, speak with your healthcare provider for a full clinical evaluation. Your provider can order appropriate blood tests, review medications, assess sleep and mental health, and recommend personalized strategies. If inflammation is suspected as a contributing factor, your provider can help monitor inflammatory markers and discuss safe, evidence-based interventions.

PlexusDx provides education about genetic predispositions only. This information is not medical advice. Always consult your healthcare provider before making changes to medications, supplements, or treatments.

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:

Healthy Aging Genetic Report

Frequently Asked Questions About FATIGUE and IL1B rs4848306

How does IL1B rs4848306 influence fatigue risk during chronic illness?

IL1B rs4848306 affects how prone you may be to inflammation-related (“central”) fatigue when you’re dealing with chronic health conditions. Individuals with two effect alleles (GG) have a higher susceptibility to prolonged fatigue, likely due to increased IL-1β production and/or greater sensitivity to IL-1β signaling. Those with one effect allele (AG) may have a moderate predisposition, while no effect alleles (AA) generally indicate typical risk related to IL-1β-driven fatigue. This does not diagnose the cause of fatigue, but it can help guide supportive prevention and next steps.

What lifestyle strategies can help reduce inflammation-related fatigue regardless of my IL1B genotype?

Even if your IL1B results suggest higher IL-1β activity, many evidence-informed habits can lower inflammation and support energy. Focus on anti-inflammatory eating (fruits, vegetables, legumes, whole grains, nuts/seeds, lean proteins; limit refined carbs, added sugars, processed meats, and trans fats), regular moderate exercise, consistent restorative sleep (7–9 hours), and stress management (mindfulness, breathing, relaxation, yoga). Supporting metabolic health by reducing excess visceral fat, quitting smoking, and moderating alcohol can also help reduce inflammatory burden that may contribute to fatigue.

Which tests and supplements are commonly considered if IL1B-linked fatigue is a concern?

Discuss persistent fatigue with your healthcare provider for a full clinical evaluation. Common monitoring includes a complete blood count (anemia), thyroid function tests (TSH, free T4), vitamin D (25-hydroxyvitamin D) and B12, and markers of inflammation such as CRP when clinically indicated, plus basic metabolic panel and metabolic screening (glucose, lipid panel). Nutrients/supplements often considered (based on diet gaps or suspected deficiencies, and only with clinician guidance) include vitamin D, B vitamins (especially B12 if low or poorly absorbed), magnesium, and omega-3s (EPA/DHA from high-quality, third-party tested sources).

What tests can help me learn more about FATIGUE and IL1B rs4848306?

The Longevity and Healthy Aging Genetic Test delivers over 200 genetic insights related to cellular repair, inflammation balance, metabolism, cardiometabolic health, and aging pathways. The Healthy Aging 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.