The Hidden Lab Markers of Chronic Inflammation (Your Doctor Might Miss)
- Dr Bret Ellington DACM, CFMP, LAc
- Aug 5, 2025
- 6 min read
Updated: Jun 24
Inflammation Is a Silent Driver of Chronic Disease
Many people associate inflammation with an injury—a swollen ankle, a sore muscle, or redness after a cut. While acute inflammation is a normal and necessary healing response, chronic low-grade inflammation is a very different story.
Chronic inflammation can quietly develop over months or years without obvious symptoms. During that time, it may contribute to fatigue, digestive issues, hormone imbalances, brain fog, weight gain, joint discomfort, autoimmune conditions, and even long COVID symptoms.
In functional medicine, chronic inflammation is viewed as a significant underlying factor in many health concerns. Rather than simply suppressing symptoms, we aim to understand why inflammation is occurring in the first place.
What Is Chronic Inflammation?
Inflammation is the body's natural defense system. When you experience an injury, infection, or toxin exposure, your immune system activates an inflammatory response to protect and repair tissues.
Problems arise when that response never fully turns off.
Chronic inflammation occurs when the immune system remains activated long after the original trigger has passed. Instead of protecting the body, persistent inflammation may begin damaging healthy tissues and disrupting normal physiological processes.
Research has linked chronic inflammation to a variety of serious health conditions, including:
Cardiovascular disease
Type 2 diabetes
Autoimmune diseases
Arthritis
Alzheimer's disease
Metabolic syndrome
Depression and mood disorders
Certain cancers
While inflammation itself is not always the primary disease, it often acts as a contributing factor that accelerates dysfunction throughout the body.
Common Symptoms Associated With Chronic Inflammation
Many individuals experiencing chronic inflammation report symptoms that seem unrelated on the surface. These symptoms may include:
Fatigue
Persistent inflammation can place significant demands on the immune system, leading to low energy levels and reduced resilience.
Brain Fog
Inflammatory chemicals called cytokines may influence brain function, contributing to poor concentration, memory issues, and mental fatigue.
Digestive Problems
Inflammation within the gastrointestinal tract may contribute to bloating, gas, constipation, diarrhea, food sensitivities, and abdominal discomfort.
Joint and Muscle Discomfort
Many people experience stiffness, aches, or generalized body pain that may be associated with inflammatory processes.
Weight Gain and Difficulty Losing Weight
Inflammation can affect hormones involved in appetite regulation, insulin sensitivity, and metabolism.
Skin Issues
Conditions such as eczema, psoriasis, rosacea, and acne often have inflammatory components.
Hormonal Imbalances
Inflammation may interfere with hormone signaling pathways, potentially impacting thyroid function, adrenal health, reproductive hormones, and insulin regulation.
Because these symptoms can overlap with many different conditions, identifying the underlying drivers becomes critical.
Why Functional Medicine Looks Beyond Symptoms
Traditional healthcare often focuses on diagnosing and managing disease after it develops. Functional medicine takes a different approach.
Rather than asking, "What medication matches this diagnosis?" we ask:
"Why is the body inflamed in the first place?"
The goal is to identify root causes and create a personalized strategy to support healing.
Common contributors to chronic inflammation may include:
Gut dysfunction
Intestinal permeability ("leaky gut")
Blood sugar instability
Nutrient deficiencies
Chronic stress
Poor sleep quality
Environmental toxin exposure
Food sensitivities
Immune dysregulation
Post-viral inflammation
Sedentary lifestyle habits
When these factors persist over time, inflammation may become chronic and self-sustaining.
The Gut-Inflammation Connection
One of the most important areas we investigate is gut health.
Approximately 70% of the immune system resides within the gastrointestinal tract. When the gut lining becomes compromised, substances that normally remain inside the digestive tract may interact with the immune system.
This process is commonly referred to as intestinal hyperpermeability or "leaky gut."
While leaky gut is frequently discussed in functional medicine, intestinal permeability is a measurable physiological process that has been studied in scientific literature.
When intestinal barrier function becomes impaired, immune activation may increase, potentially contributing to:
Food sensitivities
Autoimmune activity
Digestive symptoms
Systemic inflammation
Fatigue
Brain fog
Evaluating gut health often provides valuable insights into the inflammatory process.
Markers We Evaluate
Functional laboratory testing allows us to move beyond guessing and gather objective data.
Zonulin
Zonulin is a protein involved in regulating intestinal permeability.
Elevated levels may suggest increased intestinal permeability, which may contribute to immune activation and inflammation in susceptible individuals.
While zonulin is only one piece of the puzzle, it can provide valuable information when evaluated alongside other clinical findings.
Organic Acids Testing
Organic acids testing evaluates metabolic byproducts that can provide insights into:
Nutrient deficiencies
Mitochondrial function
Neurotransmitter metabolism
Detoxification pathways
Oxidative stress
Microbial overgrowth
These markers can help identify underlying imbalances that may contribute to inflammation, fatigue, mood changes, and cognitive symptoms.
Gut Inflammatory Markers
Comprehensive stool testing may evaluate markers associated with:
Digestive inflammation
Immune activation
Microbiome balance
Gut barrier function
Infection screening
Understanding what is occurring within the gastrointestinal tract often helps explain symptoms that appear unrelated.
Blood Sugar and Inflammation
Another commonly overlooked contributor to inflammation is blood sugar dysregulation.
Frequent blood sugar spikes can promote oxidative stress and inflammatory signaling throughout the body.
Many individuals with fatigue, weight gain, hormone imbalances, and brain fog are surprised to discover that unstable blood sugar is playing a significant role in their symptoms.
Improving blood sugar regulation through dietary and lifestyle modifications is often one of the most effective strategies for reducing inflammatory burden.
Post-Viral Inflammation and Long COVID
Over the past several years, growing attention has been placed on post-viral inflammatory conditions, including long COVID.
Some individuals continue to experience symptoms long after the initial infection has resolved, including:
Fatigue
Brain fog
Digestive issues
Exercise intolerance
Sleep disturbances
Mood changes
Emerging research suggests that persistent immune activation and inflammatory signaling may contribute to these symptoms in certain individuals.
Functional medicine approaches often focus on identifying factors that may be impairing recovery while supporting overall immune resilience and metabolic function.
Our Functional Medicine Approach
At Inner Balance Functional Medicine, we focus on identifying and addressing the root causes that may be contributing to chronic inflammation.
This often includes evaluating:
Gut permeability
Digestive function
Blood sugar balance
Nutrient deficiencies
Immune activation
Stress physiology
Post-viral recovery patterns
From there, we develop a personalized plan that may include:
Dietary Modifications
Food remains one of the most powerful tools for influencing inflammation.
Individualized nutrition strategies may help support:
Blood sugar stability
Gut healing
Immune regulation
Hormone balance
Lifestyle Optimization
Sleep, movement, stress management, and recovery practices are foundational components of long-term health.
These interventions frequently have a profound impact on inflammatory pathways.
Targeted Nutritional Supplementation
While food should always be the foundation, some individuals may require additional support when significant deficiencies or imbalances are identified.
Supplement recommendations are based on clinical findings, health history, and laboratory results.
Herbal Medicine
Evidence-informed herbal strategies may provide additional support for immune balance, stress resilience, digestion, and recovery.
Healing Requires Participation
One of the most important truths in healthcare is that no supplement, medication, or practitioner can replace consistent healthy habits.
Patient participation is often the most significant predictor of success.
Strong dietary choices, quality sleep, regular movement, stress management, and adherence to a personalized plan create the foundation for lasting change.
However, when the body has been struggling for months or years, targeted interventions may be necessary to help correct deeper imbalances and restore normal physiological function.
The goal is not simply to reduce symptoms—it is to create an environment where the body can function more efficiently and heal more effectively.
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The Bottom Line
Inflammation is rarely random.
It is often the body's response to an underlying imbalance that deserves attention.
By identifying root causes such as gut dysfunction, nutrient deficiencies, blood sugar instability, immune activation, and post-viral inflammation, we can develop a more comprehensive understanding of why symptoms are occurring.
If you are struggling with fatigue, brain fog, digestive issues, hormone imbalances, autoimmune concerns, or long COVID symptoms, investigating inflammation may be an important step toward improving your health.
Learn how a personalized functional medicine approach may help uncover the root causes behind your symptoms.
About Dr. Bret Ellington, DACM, CFMP, LAc
Dr. Bret Ellington has over 20 years of clinical experience helping patients address complex and chronic health concerns through a functional medicine approach.
Credentials
Doctor of Acupuncture and Chinese Medicine (DACM)
Certified Functional Medicine Practitioner (CFMP)
Licensed Acupuncturist (LAc)
Clinical Nutrition Certification
Licensed in Colorado and California
At Inner Balance Functional Medicine, Dr. Bret combines advanced functional laboratory testing, clinical nutrition, lifestyle medicine, and evidence-informed natural therapies to help patients identify and address the underlying factors contributing to chronic health conditions.
Disclaimer
The information provided in this article is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. Always consult with your physician or qualified healthcare provider regarding any medical concerns or before making changes to your healthcare plan. Individual results may vary. Functional medicine testing and recommendations should be interpreted within the context of a comprehensive clinical evaluation.
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