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Breakthrough Discovery: New Test May Finally Detect Chronic Fatigue Syndrome with 90% Accuracy

By Michael Lam, MD, MPH, Carrie Lam, MD, Jeremy Lam, MD

Evidence-Based Reviewed Article

In This Article

An image of a person with chronic fatigue syndromeA breakthrough study offers hope for millions of people suffering from a health condition that, to date, has had no concrete diagnostic test to identify it. This condition, known as Chronic Fatigue Syndrome (CFS), or myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), can now be detected with up to 90 percent accuracy by identifying certain biological markers in the gut microbiome.

The test’s accuracy rate may not only help address the difficulty of identifying the condition but also ensure that those suffering from Chronic Fatigue Syndrome get the care they so desperately need in a timely manner.

Another benefit for those with the condition is that the strong data found in the study helps to reinforce the fact that Chronic Fatigue Syndrome is a real biological condition. It is not a psychological issue as many people tend to believe. This complex condition affects multiple body systems and could have far-reaching consequences for your health.

Chronic Fatigue Syndrome: Causes, Symptoms, and Current Conventional Diagnosis Methods

Chronic Fatigue Syndrome is a condition that affects more than three million people in the United States alone. According to the Centers for Disease Control (CDC), more than 9 out of 10 people in the country with the condition have not been diagnosed by a doctor.[1]

The condition, marked by constant feelings of debilitating fatigue, also has numerous other symptoms that may seem unrelated. These symptoms tend to worsen when those with the condition take part in strenuous mental or physical activities. In many cases, the condition adversely affects their quality of life and may even impact their ability to work.

Causes of Chronic Fatigue Syndrome

While no one can pinpoint the cause of Chronic Fatigue Syndrome, much speculation exists. Currently, the cause is ascribed to a combination of possible factors. These include:

  • A genetic component, because the condition appears to run in families.
  • Many people start experiencing symptoms shortly after exposure to physical or emotional trauma.
  • Many people with the condition experience issues converting fuel sources, such as fats and sugars, into energy.
  • Some people develop the condition after experiencing a bacterial or viral infection.
  • Elevated stress levels may also contribute to the onset of the condition and worsen the condition’s symptoms.
  • Immune system dysfunction may contribute to the development of the condition.
  • Inflammation and oxidative stress can contribute, especially in those with neuropsychological symptoms.
  • The prevalence of endocrine, especially neuroendocrine, disorders.[2]

Symptoms of Chronic Fatigue Syndrome

Chronic Fatigue Syndrome has a wide range of symptoms. The condition includes numerous mechanisms and biochemical changes that can affect your body’s immune function, response to oxidative stress, and hormone regulation.[3] People with the condition may also experience orthostatic intolerance or post-exertional malaise.

Orthostatic intolerance is a condition that results in your symptoms worsening when standing. It is associated with your body’s ability to adjust to blood flow changes when standing up. You may also experience lightheadedness or dizziness. Some people may also faint.

Post-exertional malaise is also called post-exertional symptom exacerbation or post-exertional neuroimmune exhaustion. This condition sees a worsening of your symptoms after you take part in physical or mental activities.

Some of the other diverse symptoms associated with Chronic Fatigue Syndrome include:

  • Constant severe fatigue
  • Pain occurring in multiple joints
  • Sore throat
  • Post-exertional malaise that lasts multiple days
  • Sleep issues
  • Cognitive dysfunction, like issues with concentration, alertness, or short-term memory
  • Headaches or changes in the pattern or severity of headaches
  • Muscle pain ranging from mildly sore to severe
  • Muscle weakness
  • Lymph node tenderness
  • Shortness of breath
  • Allergies
  • Sensitivities to smells, foods, noise, light, or chemicals
  • Chills and/or night sweats
  • Irregular heartbeat
  • Digestive issues such as irritable bowel syndrome (IBS)

Current Chronic Fatigue Syndrome Detection

An image of a doctor and a patientUp until now, Chronic Fatigue Syndrome has been identified through a process of exclusion. This is because there has been no concrete, viable mechanism to test for the condition.

Your healthcare provider would conduct a thorough examination and take your health history into account. Because many of the symptoms overlap with other conditions, extensive lab tests could rule out certain health issues that could cause similar symptoms.

Only after eliminating other potential causes of your symptoms would your healthcare provider entertain Chronic Fatigue Syndrome as a possible diagnosis. And even then, you would need to meet a certain set of criteria.

According to the CDC, diagnosis of the condition depends on a specific list of criteria.[4] It starts with these required symptoms, i.e., symptoms you need to have for a potential diagnosis:

  • A reduction in the ability to engage in activities that lasts for more than six months. These include your personal, social, work, and educational life. The inability should be relatively new, not result from excessive exertion, and not be alleviated after resting.
  • The symptoms should worsen after engaging in any type of exertion, i.e., mental, emotional, or physical. This would not have occurred before the onset of the condition. Symptoms should get worse within 12 to 48 hours after the activity and should last for days or weeks.
  • Symptoms do not get better after a full night’s sleep.

Besides these criteria, you should also have at least one of the following symptoms for a Chronic Fatigue Syndrome diagnosis:

  • Cognitive impairment, e.g., memory, thinking, executive function, or information processing difficulties.
  • Symptoms that intensify upon standing. Your heart rate and blood pressure levels typically also show an increase.

Interestingly, the identification of the condition does not take other Chronic Fatigue Syndrome symptoms into account.

New Information on Chronic Fatigue Syndrome

A new study shows a marked correlation between gut biome dysbiosis, metabolism, and immune function. And what is more interesting is that the people in the study all have one thing in common: they suffer from Chronic Fatigue Syndrome.[5]

The study suggests that by utilizing information gained from your gut microbiome structure, healthcare experts can now offer a quicker Chronic Fatigue diagnosis than what was available previously. This could have a vast impact on not only how we view the condition but also on how we address it.

What The Research Found

The research, which focused on the possibility of looking at your gut bacteria, immune response, and metabolism to help with the diagnosis of Chronic Fatigue Syndrome, used data from 249 people. Using a new artificial intelligence (AI) platform, BioMapAI, they identified biomarkers from stool and blood samples, as well as other lab tests.

Using these results, they managed to achieve a 90% accuracy in identifying people with Chronic Fatigue Syndrome. This is a significant breakthrough in identifying the condition, as healthcare professionals had previously had no biomarkers to work with when trying to make an accurate diagnosis.

In many instances, the absence of biomarkers resulted in a diagnosis of the condition resulting from psychological factors alone. This has now been shown not to necessarily be an accurate method of identifying the condition.

Possible Chronic Fatigue Syndrome Indicators

An image of butyrateWhat is interesting is that people with Chronic Fatigue Syndrome showed low butyrate levels. Butyrate is a fatty acid produced in the gut from dietary fiber. It is the main energy source for colon cells. The fatty acid also supports gut health and immune function while playing a role in regulating gene expression. This is the process by which information encoded in genes creates something, like certain proteins.

Another interesting development was the use of immune cells in analyzing the severity of symptoms. Data from gut bacteria could not only help predict emotional symptoms but also sleep issues.

The bottom line of the study is that by taking diverse data into account, common disease signatures emerged in three areas: immune markers, metabolites, and fatty acids. The condition is thus not something that randomly occurs but is the result of biological dysregulation.

According to the research, the way forward is to investigate the interaction between the immune system and gut bacteria, focusing on the chemicals produced by them. Once this is established, we may have answers as to the cause of the condition and how to effectively address the issue.

Chronic Fatigue Syndrome and Brain Function

Gut health directly affects brain health. But the same applies both ways because stress, first perceived in the brain, can have a major effect on gut microbiome composition.

Dysregulated gut health can lead to numerous gut issues, including leaky gut. This means that toxins can enter the bloodstream through the gut lining and spread throughout the body. When this happens, it triggers an immune response that can result in systemic inflammation. Your brain health can be affected.

One of the most prominent effects of this type of scenario is the effect it has on your sleep and your brain’s prefrontal cortex. The stress-caused gut dysbiosis and inflammation may contribute to changes in neuronal communication.

Furthermore, gut dysbiosis may also interfere with your body’s ability to assimilate the nutrients it needs to function properly – this includes the brain. As a result, you may see symptoms that not only point to a physiological impact but that concern brain health as well.

The Best Therapy for Chronic Fatigue Syndrome

Chronic Fatigue Syndrome currently has no known cure. The best therapy is thus a multi-pronged one tailored to managing an individual’s symptoms. This means working closely with a healthcare professional to seek out therapies that work for you. People with this condition may have a variety of diverse symptoms.

1. Stress Management

Stress of any kind can have a significant impact on gut bacteria composition.[6] As a result, it could contribute to the development of Chronic Fatigue Syndrome or even worsen the condition’s symptoms. By minimizing your stress exposure or learning stress management techniques, you could manage the symptoms associated with the condition.

2. Cognitive Behavioral Therapy

Many people with Chronic Fatigue Syndrome suffer from anxiety or depression. Cognitive behavioral therapy focuses on changing your negative thinking patterns. In so doing, you may see an improvement in your mental health, turning negative thoughts and behavior into more positive responses when faced with challenges.

3. Medications

Your healthcare provider may suggest the use of certain medications to help you deal with your symptoms. You could also explore the use of beneficial supplements in this regard.

4. Address Comorbidities

Certain medical conditions may worsen your symptoms. Examples of these include sleep apnea and thyroid dysfunction. Addressing these conditions may help reduce some Chronic Fatigue Symptoms.

5. Make Lifestyle Changes

An image of a person taking a napMaking certain lifestyle changes may better enable you to manage your various symptoms. These include using techniques to help you conserve energy throughout the day. This may include taking a mid-afternoon nap, for example.

You should also look into creating an environment that supports a good night’s rest. Along with getting eight hours of sleep per night, you should also aim to have a calm sleeping environment that is dark and has no distractors like electronic devices. Going to bed at the same time each night and taking a warm bath or shower before bedtime may also induce beneficial conditions for great sleep.

Managing your diet may also help. This means focusing on a diet that includes whole foods, healthy fats and proteins, and complex carbohydrates. In other words, eat plenty of fresh fruit, vegetables, and whole grains.

You should also limit your intake of processed foods, caffeine, and refined sugars. These not only add stress to the body but also affect your body’s energy levels. Cutting them out will promote better energy conservation and usage while reducing symptoms.

6. Pacing

Pacing yourself means balancing your activities with some rest. Don’t expect to start working at eight in the morning and keep up your pace until 5 pm. Make sure you have multiple breaks throughout the day to relax. You can talk to your healthcare provider or a physical therapist for more information on how to go about developing a pacing plan that suits your individual needs.

In Closing

Chronic Fatigue Syndrome can have a debilitating effect on your mental and physical health. The symptoms, over time, can prove debilitating and affect your quality of life. The new research described in this article may help identify the condition much faster than before. In so doing, it may pave the way forward for a quicker diagnosis that will help you develop a plan to manage the condition.

At Lam Clinic, we understand how exhausting chronic fatigue can be. Our team provides integrative support that focuses on root causes and practical next steps. We are here to help you restore balance, rebuild resilience, and feel more like yourself again. Contact us today to take the first step toward lasting wellness.

References

  1. Centers for Disease Control and Prevention. What is ME/CFS? [Internet]. Atlanta (GA): CDC; 2024 [cited 2025 Oct 16]. Available from: https://www.cdc.gov/me-cfs/about/index.html
  2. Cortes Rivera M, Mastronardi C, Silva-Aldana C, Arcos-Burgos M, Lidbury B. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: A comprehensive review. Diagnostics. 2019 Aug 7;9(3):91. Available from: https://pubmed.ncbi.nlm.nih.gov/31394725/
  3. Sapra A, Bhandari P. Chronic Fatigue Syndrome [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 [cited 2025 Oct 16]. Available from: https://www.ncbi.nlm.nih.gov/books/NBK557676/
  4. Centers for Disease Control and Prevention (CDC). IOM 2015 diagnostic criteria [Internet]. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome; 2024 [cited 2025 Oct 16]. Available from: https://www.cdc.gov/me-cfs/hcp/diagnosis/iom-2015-diagnostic-criteria-1.html
  5. Xiong R, Aiken E, Caldwell R, Vernon SD, Kozhaya L, Gunter C, et al. AI-driven multi-omics modeling of myalgic encephalomyelitis/chronic fatigue syndrome. Nature Medicine [Internet]. 2025 Jul 25 [cited 2025 Oct 16]. Available from: https://www.nature.com/articles/s41591-025-03788-3
  6. Madison A, Kiecolt-Glaser JK. Stress, depression, diet, and the gut microbiota: human–bacteria interactions at the core of psychoneuroimmunology and nutrition. Current Opinion in Behavioral Sciences [Internet]. 2019 Aug;28(3):105–10. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC7213601/

Dr. Lam’s Key Questions

Yes, Chronic Fatigue Syndrome is related to adrenal fatigue. These conditions have very much in common, including gut health issues as well as the diverse range of symptoms associated with them. Chronic Fatigue Syndrome is possibly a symptom of adrenal fatigue.

Unfortunately, there is no current cure for Chronic Fatigue Syndrome. The focus is on managing the symptoms and trying to ensure the condition does not worsen over time.

Diet can most certainly affect Chronic Fatigue Syndrome. A healthy diet that includes lean protein, healthy fats, and plenty of fruits, vegetables, and nuts may have a beneficial effect on the condition while helping with symptom management.

© Copyright 2026 Michael Lam, M.D. All Rights Reserved.