Evidence Atlas

The research, structured.

Every entry is classified by evidence level, disease context, and PEM status. Filter to find what matters for your situation.

135 studies

NewestEvidence
E0 ConsensusPEM ✓PreliminaryReview-NarrativeMachine draft

Epigenetic reprograming in myalgic encephalomyelitis/chronic fatigue syndrome: A narrative of latent viruses.

Apostolou, Eirini, Rosén, Anders·Journal of internal medicine·2024

This review examines how viruses, particularly Epstein-Barr virus, may cause lasting changes to how our cells work in ME/CFS patients. The authors found that in about 70% of ME/CFS cases, the illness begins after a viral infection, and viruses can hide in the body while triggering long-term problems with energy, thinking, and immune function. Understanding these viral-triggered changes could help explain why different patients experience ME/CFS differently and may lead to better treatments.

Post-Exertional MalaiseImmune Dysregulation
E0 ConsensusPEM ✓Moderate confidenceReview-NarrativeReviewed

Chronic Fatigue Syndrome: Diagnosis, Treatment, and Future Direction.

Graves, B Sue, Patel, Mitsu, Newgent, Hailey et al.·Cureus·2024

ME/CFS is a serious illness that causes extreme tiredness that doesn't improve with rest and often gets worse with activity. People with ME/CFS also struggle with brain fog, pain, sleep problems, and immune system issues. Right now, doctors don't have a simple blood test or scan to diagnose ME/CFS, which makes it hard to identify and treat the condition properly.

BiomarkersCognitive ImpairmentPost-Exertional MalaiseImmune Dysregulation
E0 ConsensusPEM ?Moderate confidenceReview-NarrativeReviewed

Advancing Research and Treatment: An Overview of Clinical Trials in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) and Future Perspectives.

Seton, Katharine A, Espejo-Oltra, José A, Giménez-Orenga, Karen et al.·Journal of clinical medicine·2024

This review examined research studies testing various treatments for ME/CFS, including medications and supplements that target different aspects of the illness like immune function, metabolism, and gut health. The authors found that current treatments mainly manage symptoms rather than address the root causes, with very few patients recovering fully. They emphasize that better-designed clinical trials are urgently needed to find treatments that actually work and can be used in real-world medical practice.

Post-Exertional MalaiseImmune Dysregulation
E0 ConsensusPEM ?Moderate confidenceReview-NarrativeReviewed

Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: the biology of a neglected disease.

Arron, Hayley E, Marsh, Benjamin D, Kell, Douglas B et al.·Frontiers in immunology·2024

This review examines what we know about ME/CFS by looking at how the disease develops from a combination of genetic factors, infections, and immune problems. The researchers found that ME/CFS appears to result from multiple body systems going wrong at the same time—including the immune system, inflammation, digestive health, and energy production. The study argues that doctors and scientists need to stop looking at ME/CFS as a single problem and instead understand it as a complex condition involving many interconnected issues.

Metabolic DysfunctionImmune Dysregulation
E1 ReplicatedPEM ?Moderate confidenceRCTMachine draft

RESTORE ME: a RCT of oxaloacetate for improving fatigue in patients with myalgic encephalomyelitis/chronic fatigue syndrome.

Cash, Alan, Vernon, Suzanne D, Rond, Candace et al.·Frontiers in neurology·2024

This study tested whether a supplement called oxaloacetate could help reduce fatigue in ME/CFS patients. Eighty-two people with ME/CFS took either 2,000 mg of oxaloacetate or a placebo daily for three months. The oxaloacetate group experienced a significant 25% reduction in fatigue, while the placebo group only improved by 10%, and the supplement was well tolerated with no safety concerns.

Metabolic Dysfunction
E3 PreliminaryPEM ?PreliminaryMechanisticReviewed

Potential pathophysiological role of the ion channel TRPM3 in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and the therapeutic effect of low-dose naltrexone.

Löhn, Matthias, Wirth, Klaus Josef·Journal of translational medicine·2024

This study explores how a specific ion channel called TRPM3, which helps control pain signals and immune cell function, may not work properly in ME/CFS patients. The researchers found that immune cells called natural killer cells have reduced function due to TRPM3 problems, and a medication called low-dose naltrexone (LDN) may help restore this function in laboratory tests. This could explain why some ME/CFS patients report feeling better with LDN treatment.

Immune Dysregulation
E2 ModeratePEM ✗Moderate confidenceCross-SectionalReviewed

Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Impact on Quality of Life (QoL) of Persons with ME/CFS.

Muirhead, Nina L, Vyas, Jui, Ephgrave, Rachel et al.·Medicina (Kaunas, Lithuania)·2024

This study surveyed 876 people with ME/CFS from 26 countries to understand how the condition affects their daily lives. People with ME/CFS reported very poor quality of life, with an average health rating of 36 out of 100. The most common problems were difficulty doing everyday activities (97%), pain (92%), and trouble with movement (83%).

E2 ModeratePEM ✓PreliminaryCross-SectionalMachine draft

Immunological Patient Stratification in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

Rohrhofer, Johanna, Hauser, Lisa, Lettenmaier, Lisa et al.·Journal of clinical medicine·2024

This study found that ME/CFS patients have different types of immune system problems. Researchers divided patients into two groups: those with weakened immune systems and those with normal immune systems. The two groups showed different patterns of illness—one group had low levels of a protective immune protein, while the other group had signs that their gut barrier was leaking. This suggests that ME/CFS may not be one disease but rather multiple conditions that need different treatment approaches.

Immune Dysregulation
E3 PreliminaryPEM ✓PreliminaryMechanisticReviewed

Single-cell transcriptomics of the immune system in ME/CFS at baseline and following symptom provocation.

Vu, Luyen Tien, Ahmed, Faraz, Zhu, Hongya et al.·Cell reports. Medicine·2024

Researchers used advanced technology to examine immune cells from ME/CFS patients and healthy controls, both at rest and after exercise. They found that ME/CFS patients have problems with a type of immune cell called monocytes that appear abnormal and may be moving into tissues inappropriately. After exercise, patients showed additional problems with platelets (cells involved in blood clotting), suggesting the disease involves multiple layers of immune system dysfunction.

Post-Exertional MalaiseImmune Dysregulation
E3 PreliminaryPEM ✓Moderate confidenceGuidelineReviewed

Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) in Adolescents: Practical Guidance and Management Challenges.

Rowe, Katherine·Adolescent health, medicine and therapeutics·2023

ME/CFS is a serious illness causing extreme tiredness that doesn't improve with rest, along with worsening after activity, brain fog, poor sleep, and sometimes dizziness and pain. This paper reviews what we know about treating ME/CFS in teenagers and young people, finding that currently there are no proven cure treatments, but symptom management and lifestyle adjustments help most. The study emphasizes that staying connected to school and having supportive doctors who listen made the biggest difference in how well young people managed their illness over time.

Post-Exertional Malaise
E0 ConsensusPEM ✓PreliminarySystematic-ReviewMachine draft

A scoping review of 'Pacing' for management of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS): lessons learned for the long COVID pandemic.

Sanal-Hayes, Nilihan E M, Mclaughlin, Marie, Hayes, Lawrence D et al.·Journal of translational medicine·2023

This review looked at 17 studies about 'pacing'—a strategy where people with ME/CFS carefully manage their activity level to avoid making symptoms worse. The researchers found that studies on pacing had very different designs and results: some showed pacing helped, some showed no benefit, and a few suggested it could be harmful. The evidence so far isn't strong enough to confidently say whether pacing works best for everyone.

Post-Exertional Malaise
E2 ModeratePEM ✗Moderate confidenceObservationalReviewed

Deficient butyrate-producing capacity in the gut microbiome is associated with bacterial network disturbances and fatigue symptoms in ME/CFS.

Guo, Cheng, Che, Xiaoyu, Briese, Thomas et al.·Cell host & microbe·2023

Researchers studied gut bacteria in people with ME/CFS and found that they have fewer healthy bacteria that produce a substance called butyrate, which normally helps protect the gut and reduce inflammation. The bacteria that are missing—Faecalibacterium prausnitzii and Eubacterium rectale—are known to be beneficial in healthy people. Importantly, people with more of these bacteria had less severe fatigue, suggesting a connection between gut bacteria health and ME/CFS symptoms.

E0 ConsensusPEM ✓PreliminarySystematic-ReviewMachine draft

Posttreatment Lyme disease syndrome and myalgic encephalomyelitis/chronic fatigue syndrome: A systematic review and comparison of pathogenesis.

Bai, Natalie A, Richardson, Christie S·Chronic diseases and translational medicine·2023

This review examined 18 studies comparing two similar chronic illnesses: posttreatment Lyme disease syndrome (PTLDS), which affects about 10% of Lyme disease patients even after antibiotic treatment, and ME/CFS. Both conditions cause severe fatigue, cognitive problems, pain, and sleep issues that last for months or years. The researchers found that patients with PTLDS experience many of the same symptoms as ME/CFS patients, suggesting these different illnesses may develop through similar biological pathways in the body.

Post-Exertional Malaise
E3 PreliminaryPEM ?Weak / uncertainReview-NarrativeReviewed

[Myalgic encephalomyelitis/chronic fatigue syndrome: an overview of current evidence].

Ludwig, Birgit, Olbert, Elisabeth, Trimmel, Karin et al.·Der Nervenarzt·2023

This review examines what we currently know about ME/CFS, including how it is diagnosed and what treatments have been studied. The authors note that after many years of research, we still don't have clear answers about what causes ME/CFS or proven treatments that work for everyone. They suggest that the high rates of depression and anxiety seen in ME/CFS patients should make us consider whether psychological factors play a role in the condition.

E0 ConsensusPEM ?Moderate confidenceEditorialReviewed

Understanding, diagnosing, and treating Myalgic encephalomyelitis/chronic fatigue syndrome - State of the art: Report of the 2nd international meeting at the Charité Fatigue Center.

Steiner, Sophie, Fehrer, Annick, Hoheisel, Friederike et al.·Autoimmunity reviews·2023

Over 100 international researchers gathered in Berlin in May 2023 to discuss what we currently know about ME/CFS, how to diagnose it, and how to treat it. The conference highlighted that ME/CFS involves problems with the immune system, blood vessel function, and nervous system control, and that some cases may be triggered by viruses reactivating in the body. Despite growing interest due to Long COVID, ME/CFS remains under-researched and needs significantly more funding to find better diagnostic tests and targeted treatments.

Autonomic Nervous SystemImmune Dysregulation
E2 ModeratePEM ✓PreliminaryCross-SectionalReviewed

Two symptoms can accurately identify post-exertional malaise in myalgic encephalomyelitis/chronic fatigue syndrome.

Davenport, Todd E, Chu, Lily, Stevens, Staci R et al.·Work (Reading, Mass.)·2023

This study found that asking patients about just two specific symptoms can accurately identify post-exertional malaise (PEM), the key feature of ME/CFS. Researchers had people with ME/CFS and healthy controls exercise twice, 24 hours apart, and report their symptoms at different times. The most reliable symptoms for identifying PEM were cognitive problems (brain fog), worsening function, and loss of positive feelings or mood.

Post-Exertional Malaise
E3 PreliminaryPEM ?PreliminaryReview-NarrativeReviewed

Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) and Comorbidities: Linked by Vascular Pathomechanisms and Vasoactive Mediators?

Wirth, Klaus J, Löhn, Matthias·Medicina (Kaunas, Lithuania)·2023

This study examines why ME/CFS patients often experience other conditions like POTS, mast cell activation, endometriosis, and small fiber neuropathy at the same time. The researchers analyzed how these conditions might share common problems with blood vessel function and chemical messengers in the body. They found strong evidence that excessive inflammatory chemicals and problems with a specific receptor in the body (β2AdR) may be the connecting link between all these conditions.

E0 ConsensusPEM ?Moderate confidenceEvidence-MapReviewed

ME/CFS and Long COVID share similar symptoms and biological abnormalities: road map to the literature

Anthony L. Komaroff, W. Ian Lipkin·Frontiers in Medicine·2023

Harvard and Columbia researchers conducted a comprehensive review of biological abnormalities in ME/CFS and Long COVID. They found striking overlaps in immune dysregulation, autonomic dysfunction, metabolic disruption, and neurological features. The paper maps the literature to guide researchers working across both conditions.

Long COVID OverlapImmune Dysregulation
E2 ModeratePEM ✓PreliminaryCross-SectionalMachine draft

Pediatric Post-Acute Sequelae of SARS-CoV-2 Infection.

Jason, Leonard A, Johnson, Madeline, Torres, Chelsea·Fatigue : biomedicine, health & behavior·2023

This study compared young people recovering from long COVID (PASC) with young people who have ME/CFS to understand how their symptoms differ. Researchers asked 19 parents about their child's symptoms during initial COVID infection and again later, then compared these to 19 young people with ME/CFS. Most PASC symptoms improved over time, but fatigue and sleep problems stayed high—similar to what ME/CFS patients experience.

Sleep DysfunctionPost-Exertional Malaise
E2 ModeratePEM ✓Moderate confidenceCross-SectionalReviewed

Post-exertional malaise among people with long COVID compared to myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS).

Vernon, Suzanne D, Hartle, Megan, Sullivan, Karen et al.·Work (Reading, Mass.)·2023

This study looked at whether people with Long COVID experience post-exertional malaise (PEM)—a hallmark symptom of ME/CFS where symptoms get worse after physical or mental activity. Researchers surveyed 80 Long COVID patients and compared their experiences to 151 ME/CFS patients. Nearly all Long COVID patients reported having PEM, but the way they experienced it differed significantly from ME/CFS patients in terms of what triggered it, which symptoms appeared, and how to recover.

Post-Exertional Malaise
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Research Collections

Curated groups of studies organised by theme or clinical question.

Neuroinflammation Evidence

PET imaging and other studies providing evidence for brain inflammation in ME/CFS.

Neurology

Metabolism & Mitochondria

Metabolomics and mitochondrial function studies revealing energy metabolism disruption.

Metabolism

Biomarkers

Studies identifying potential biological markers for ME/CFS diagnosis and stratification.

Biomarker

PEM-Specific Research

Studies specifically examining post-exertional malaise, the hallmark symptom of ME/CFS.

PEM