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 Fatigue and the TNF Gene

Fatigue is more than occasional tiredness. Chronic low energy can affect physical, mental, and emotional well-being. One biological factor that can contribute to persistent fatigue is low-grade inflammation. The TNF gene helps produce TNF-alpha, a key inflammatory signaling protein. Variations in this gene can influence how much TNF-alpha your body makes, which may affect inflammation levels and therefore your tendency toward chronic fatigue.

How TNF-alpha May Affect Energy

  • TNF-alpha is part of the immune response. When it is elevated it can create an ongoing inflammatory state.
  • Chronic inflammation can divert energy from normal functions and produce symptoms such as persistent tiredness, brain fog, and reduced exercise tolerance.
  • Genetic variants in TNF can change the amount of TNF-alpha produced, altering susceptibility to inflammation-related fatigue.
2 effect alleles (TT) — higher TNF-alpha production

If your genotype is TT for rs1799724, you carry two copies of the effect allele linked with higher TNF-alpha levels. This may increase your risk for chronic low-grade inflammation and related fatigue. Elevated TNF-alpha can promote immune activation and a prolonged inflammatory response that may sap energy and interfere with recovery.

What this can mean for you:

  • Greater sensitivity to triggers that promote inflammation, such as poor sleep, high sugar intake, or chronic stress.
  • Possible benefit from targeted anti-inflammatory strategies to reduce overall inflammatory load.
  • Monitoring symptoms and discussing them with your healthcare provider is especially important.
1 effect allele (CT) — likely higher TNF-alpha production

If your genotype is CT for rs1799724, you carry one copy of the effect allele. This variant is associated with a likely increase in TNF-alpha production compared with two non-effect alleles. You may have a moderate predisposition to inflammation-related fatigue, but lifestyle and environment play a large role in whether that predisposition becomes active.

What this can mean for you:

  • Inflammation-related fatigue is a possible concern, particularly when combined with other risk factors like poor sleep or a pro-inflammatory diet.
  • Proactive steps in diet, physical activity, stress management, and sleep can meaningfully reduce risk and symptom burden.
0 effect alleles (CC) — typical TNF-alpha production

If your genotype is CC for rs1799724, you have two copies of the non-effect allele. This suggests a typical predisposition for TNF-alpha production and a lower genetic risk for inflammation-driven fatigue from this variant. However, fatigue has many causes, and lifestyle, medical conditions, medications, and environment remain important determinants.

What this can mean for you:

  • Genetics does not indicate elevated TNF-alpha based on this variant, but inflammation from other causes remains possible.
  • Maintaining healthy habits is still key to preventing fatigue and supporting long-term energy.

Practical Recommendations to Support Energy and Reduce Inflammation

Diet

  • Follow an anti-inflammatory pattern: prioritize colorful fruits and vegetables, whole grains, legumes, nuts, seeds, and fatty fish high in omega-3s (salmon, sardines).
  • Choose healthy fats such as extra virgin olive oil and avocado while limiting saturated and trans fats found in processed foods.
  • Limit refined sugars, sweets, and highly processed carbohydrates that promote inflammation and energy crashes.
  • Consider meal timing and balance: combine protein, fiber, and healthy fats to stabilize blood sugar and sustain energy.
  • Stay hydrated. Even mild dehydration can worsen fatigue and cognitive function.

Supplements (discuss with your healthcare provider)

  • Omega-3 fatty acids (EPA and DHA): may help reduce inflammatory signaling for some people.
  • Vitamin D: low levels are linked to fatigue and immune dysregulation; test your level before supplementing.
  • Magnesium: supports sleep and muscle function and may help with energy when dietary intake is low.
  • Probiotics: supporting gut health can influence systemic inflammation for some individuals.
  • Curcumin: an anti-inflammatory compound in turmeric that may help lower inflammatory markers in some people. Absorption varies by formulation.

Lifestyle Strategies

  • Sleep: prioritize consistent sleep timing, aim for 7 to 9 hours, and optimize sleep quality with a dark, cool, quiet bedroom.
  • Regular physical activity: moderate aerobic exercise and resistance training can reduce inflammation and boost mitochondrial energy production. Tailor intensity if fatigue is severe and progress gradually.
  • Stress management: incorporate daily practices such as mindfulness meditation, yoga, deep breathing, or progressive muscle relaxation to lower inflammatory stress responses.
  • Healthy weight: maintaining a healthy body composition reduces inflammatory signaling and supports energy.
  • Avoid smoking and limit alcohol intake, both of which can increase inflammation and worsen sleep and energy.

Medical and Laboratory Considerations

  • Discuss basic labs with your healthcare provider to rule out common contributors to fatigue: complete blood count, TSH, fasting glucose or A1c, liver and kidney function, vitamin D, ferritin, and c-reactive protein or other inflammatory markers if clinically indicated.
  • If symptoms are persistent or worsening despite lifestyle changes, further evaluation for conditions such as sleep apnea, chronic infection, autoimmune disease, or mood disorders may be warranted.
  • Keep a symptom diary tracking sleep, diet, stressors, activity, and fatigue severity to share with your clinician for more personalized assessment.

When to Talk to Your Healthcare Provider

  • If fatigue is severe, persistent, interferes with daily life, or is accompanied by unexplained weight loss, fevers, night sweats, new pain, or cognitive decline.
  • Before beginning any new supplement or major lifestyle change, especially if you have chronic health conditions or take prescription medications.
  • To interpret genetic results in the context of your full medical history and family history and to build a personalized plan.

PlexusDx provides educational information about genetic predispositions and how they may relate to health and wellness. This content is not medical advice. Always consult your healthcare provider before making changes to diet, supplements, exercise, or medical care.

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 FATIGUE and TNF rs1799724

How can TNF gene variants influence chronic fatigue?

Fatigue can be driven by low-grade inflammation. The TNF gene helps produce TNF-alpha, a key inflammatory signaling protein. Genetic variations in TNF can shift how much TNF-alpha your body produces, which may affect your tendency toward inflammation-related fatigue—often showing up as persistent tiredness, brain fog, and reduced exercise tolerance.

What do rs1799724 genotypes (TT, CT, CC) mean for inflammation-related energy?

For rs1799724, TT is associated with higher TNF-alpha production and may increase risk for chronic low-grade inflammation and related fatigue. CT is linked with likely higher TNF-alpha than non-effect alleles, suggesting a moderate predisposition that can become more noticeable when combined with factors like poor sleep or a pro-inflammatory diet. CC suggests typical TNF-alpha production with a lower genetic risk from this variant, though other causes of fatigue can still apply.

What lifestyle and supplement strategies can help reduce TNF-alpha–linked inflammation?

An anti-inflammatory approach can support energy even when TNF-related predisposition is present. Focus on colorful fruits and vegetables, whole grains, legumes, nuts, seeds, and omega-3–rich fatty fish; choose healthy fats like extra virgin olive oil; limit refined sugars and highly processed carbohydrates; and stay hydrated. Support sleep (7–9 hours), regular moderate aerobic and resistance exercise, and stress management (e.g., mindfulness or deep breathing). Supplements discussed with a healthcare provider may include omega-3s, vitamin D, magnesium, probiotics, and curcumin, alongside basic labs (e.g., CBC, TSH, A1c, ferritin, vitamin D, and inflammation markers if indicated) to rule out other fatigue causes.

What tests can help me learn more about FATIGUE and TNF rs1799724?

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.