ME/CFS Explainer

(Myalgic Encephalomyelitis / Chronic Fatigue Syndrome)

Last updated 23 September 2026

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Grok explains

For anyone who cannot read for long. It does not start by itself.

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I am Grok, an artificial intelligence. Not a doctor. Short, because reading is tiring. No single gene causes ME/CFS. In 2025 DecodeME found eight places in the DNA. Under them sit 29 genes the study trusts most, and three more: FBXL4, OLFM4 and CCPG1. Most belong to immunity or the nervous system. Two point at the mitochondria. FBXL4 maintains them. DARS2 builds protein inside mitochondria. Measured, not inherited: WASF3 in muscle can disturb the energy machines. Pyruvate dehydrogenase slows the entry. IDO1 pushes tryptophan toward kynurenine. This is not a test and not a treatment.

Sources · X and the papers

Whom we cite — and whose work we include

For each paper, the X post that carries it, and the authors. The work stays theirs. No voice is presented as ours.

  1. 1

    Maria Tsamou

    Paper, not X

    Where: microRNA

    Maria Tsamou, Fabiënne A. C. Kremers, Keano A. Samaritakis, Erwin L. Roggen.

    A 2024 review of ME/CFS and fibromyalgia, not only Long COVID. MicroRNAs named more than once sit on the immune response, mitochondria and oxidative stress, including miR-146a, miR-21, miR-150 and miR-29. Not a test.

    Tsamou et al., Int. J. Mol. Sci. 2024
  2. 2

    Mateusz Piotr Kaczmarek

    Paper, not X

    Where: microRNA · EBV

    Mateusz Piotr Kaczmarek.

    A 2023 computation: circulating microRNAs in ME/CFS differ from person to person, but hit the same gene cluster. Eight of the ten most central ones are raised by herpesviruses, including Epstein-Barr, also in latency. Not proof of an active infection. No X post with this file.

    Kaczmarek, PLOS One 2023
  3. 3

    Carmen Scheibenbogen

    @C_Scheibenbogen · post

    Where: Reading

    Nature news desk. Shared by Carmen Scheibenbogen.

    Post of 8 September 2026. A survey of the research on Long COVID and ME/CFS. A citation. No treatment from this app.

    Nature, News Feature 2026
  4. 4

    Carmen Scheibenbogen

    @C_Scheibenbogen · post

    Where: Reading

    Carmen Scheibenbogen, Jonas Bergquist and others.

    Post of 17 October 2025. ME/CFS is not a result of avoiding activity. PEM remains the leading symptom. A citation.

    Nature Communications 2025
  5. 5

    Solve ME/CFS Initiative

    @PlzSolveCFS · post

    Where: Reading

    Carmen Scheibenbogen, Jonas Bergquist and others.

    Post of 23 October 2025. The same paper, shared by Solve. A citation, not our voice.

    Nature Communications 2025
  6. 6

    Carmen Scheibenbogen

    @C_Scheibenbogen · post

    Where: Pacing

    Charité, CFS_CARE. Shared by Carmen Scheibenbogen.

    Post of 27 June 2026. Preprint: no improvement after twelve months. In 45 percent, a worsening afterwards. A citation, not a recommendation.

  7. 7

    Jon Douglas

    @atranscendedman · post

    Where: Triangle

    Braeden T. Charlton, Anouk Slaghekke, Brent Appelman, Moritz Eggelbusch, Rob C. I. Wüst and others. Vrije Universiteit Amsterdam.

    Post of 28 July 2026. Muscle and mitochondria in Long COVID and ME/CFS differ from 60 days of bed rest. Inactivity does not explain it. A citation.

    Charlton et al., Nature Communications 2026
  8. 8

    Thailand Medical News

    @ThailandMedicaX · post

    Where: Triangle

    The same muscle paper: Charlton, Wüst and others.

    Post of 29 July 2026. A news piece on the same finding. A citation, not our voice.

    Charlton et al., Nature Communications 2026
  9. 9

    AMMES

    @AmmesAdmin · post

    Where: Triangle

    Sergio Abanades, Irene Fernández, Nuria Capdevila, Francisco Cardona.

    Post of 28 August 2026. A review of micronutrients and mitochondria in ME/CFS, including B-complex, Q10, GlyNAC and L-carnitine. No dose from this app.

    Abanades et al., Nutrients 2026
  10. 10

    Tom Kindlon

    @TomKindlon · post

    Where: Reading

    Named in the post as a US paper, without an author line.

    Post of 10 June 2026. Vesicles and mitochondrial membrane potential in Long COVID and ME/CFS. A citation.

    Open Forum Infectious Diseases 2026
  11. 11

    Carmen Scheibenbogen

    @C_Scheibenbogen · post

    Where: Reading

    Sonya Marshall-Gradisnik and others. Shared by Carmen Scheibenbogen.

    Post of 21 May 2025. LDN and the ion channel TRPM3, with a link to mitochondria. A citation. This app sets no drug dose.

    Frontiers in Molecular Biosciences 2025
  12. 12

    Carmen Scheibenbogen

    @C_Scheibenbogen

    Where: Triangle · reading

    Claudia Kedor, Carmen Scheibenbogen and others.

    Nature Communications 2022: SARS-CoV-2 can trigger ME/CFS. Patient sheet of February 2020 with Grabowski: four weeks of B-complex, Q10 at most 100 mg, D-ribose 3×5 g, NAC 2–3×600 mg. No single X post carries this file. A citation. Not a treatment.

    Kedor et al., Nature Communications 2022
  13. 13

    Jesús Castro-Marrero

    @JCastro_Marrero

    Where: Q10

    Jesús Castro-Marrero, Maria José Segundo, Marcos Lacasa, Alba Martinez-Martinez, Ramon Sanmartin Sentañes, José Alegre-Martin.

    Nutrients 2021: 200 mg Q10 plus 20 mg NADH. A small effect on cognitive fatigue. The app stays at most 100 mg Q10. The post for this exact file was not at hand.

    Castro-Marrero et al., Nutrients 2021
  14. 14

    Jacob Teitelbaum

    Paper, not X

    Where: Ribose

    Jacob Teitelbaum, C. Johnson, J. St. Cyr.

    Open pilot study 2006, no placebo: D-ribose 3×5 g. Weak evidence. No X post with this file.

    Teitelbaum, Johnson, St. Cyr, 2006
  15. 15

    Dikoma C. Shungu

    Paper, not X

    Where: NAC

    Dikoma C. Shungu and others.

    IACFS/ME 2016 and an MRS abstract 2020: four weeks of NAC, glutathione in the brain. No proof that fatigue falls in a clinically relevant way. No X post with this file.

    Shungu et al., ISMRM 2020

Section

Genes in ME/CFS

DecodeME: 29 genes in the first tier and three in the second. The study set histone genes aside. Under that, the readout of mitochondrial genes, which is not an inherited change. Not a test, not a diagnosis, not a treatment.

  • RABGAP1L

    Tier 1

    Defence against viruses and bacteria. The risk allele goes with less of this protein.

  • DARS2

    Tier 1 · mitochondria

    Builds protein inside mitochondria. Mitochondrial aspartyl-tRNA synthetase.

  • RC3H1

    Tier 1

    Regulates immune RNA. A candidate at the same place as RABGAP1L.

  • GPR52

    Tier 1

    A receptor in the nervous system. A candidate, not a single cause.

  • ZBTB37

    Tier 1

    A switch for reading genes. A candidate.

  • TNFSF4

    Tier 1

    A signal to T cells, also called OX40L.

  • ANKRD45

    Tier 1

    A candidate at the same DNA place. Not shown to be the cause.

  • KLHL20

    Tier 1

    Helps break down proteins. A candidate.

  • PRDX6

    Tier 1

    Protects against oxidative stress.

  • SERPINC1

    Tier 1

    Antithrombin. Clotting. Not meant as an ME/CFS test.

  • SLC9C2

    Tier 1

    Exchanges sodium and protons. A candidate.

  • BTN2A2

    Tier 1

    T cells and innate immunity.

  • TRIM38

    Tier 1

    Immune signalling. A candidate at the butyrophilin place.

  • ZNF322

    Tier 1

    A zinc finger, reading of genes. A candidate.

  • ABT1

    Tier 1

    Helps start the reading of genes. A candidate.

  • HFE

    Tier 1

    Iron handling. A candidate, not iron advice.

  • BTN3A3

    Tier 1

    A butyrophilin, immunity. A candidate.

  • HMGN4

    Tier 1

    Sits on chromatin. A candidate.

  • SUDS3

    Tier 1

    Dampens microglial inflammation.

  • PEBP1

    Tier 1

    Binds signalling kinases. A candidate at the same place as SUDS3.

  • VSIG10

    Tier 1

    Immune-like. A candidate, function open.

  • CA10

    Tier 1

    Pain pathways. Overlaps a known pain signal. Not depression.

  • CSE1L

    Tier 1

    Transport into the nucleus. A candidate.

  • ARFGEF2

    Tier 1

    Vesicle traffic in the cell. A candidate.

  • DDX27

    Tier 1

    An RNA helicase. A candidate.

  • STAU1

    Tier 1

    Moves RNA. A candidate.

  • ZNFX1

    Tier 1

    Recognises RNA viruses.

  • B4GALT5

    Tier 1

    Adds sugars to proteins. A candidate.

  • PTGIS

    Tier 1

    Makes prostacyclin. Blood vessels. A candidate, no dose.

  • FBXL4

    Tier 2 · mitochondria

    Maintains mitochondria and clears broken ones.

  • OLFM4

    Tier 2

    Neutrophils, immunity. Also faintly seen with PEM in other biobanks.

  • CCPG1

    Tier 2

    Autophagy and stress of the endoplasmic reticulum.

  • MT-RNR1 · MT-RNR2

    Readout

    Two genes of the mitochondrial genome. Read less in immune cells. Not an inherited change.

  • MT-ATP6 · MT-CO1 · MT-CO2 · MT-CO3

    Readout

    Respiratory chain, read more in platelets. The direction depends on the tissue.

  • MT-CYB · MT-ND3 · MT-ND5

    Readout

    Further mitochondrial genes, the same platelet paper. Not a panel for every tissue.

DecodeME, medRxiv 2025 · Mitochondrial genes, Int. J. Mol. Sci. 2026

Section

Proteins, beside them

  • WASF3

    Protein

    Higher in muscle in some people with ME/CFS. Can disturb mitochondrial supercomplexes. Endoplasmic stress can raise it.

  • PDH

    Enzyme complex

    Pyruvate dehydrogenase. This is where carbohydrate enters the mitochondria. Fluge describes a brake here.

  • Komplex I

    Respiratory chain

    Protein machines in the mitochondrial membrane. Muscle biopsies show less oxidative output. Inactivity alone does not explain it.

  • Komplex IV

    Respiratory chain

    Cytochrome c oxidase. Lower in muscle together with higher WASF3. Hwang 2023.

  • GDF15

    Protein in blood

    A stress signal from mitochondria. Rises after exertion with fatigue and PEM. A marker, not a treatment.

  • Komplement

    Immune proteins

    Proteins of innate immunity. More active after exertion in ME/CFS.

  • ADRB2 · CHRM

    Receptors

    The β2-adrenergic receptor and muscarinic receptors. Autoantibodies in some people. One ELISA separates poorly.

  • ATP1A

    Ion pump

    Na+/K+-ATPase in the muscle membrane. Wirth: a hypothesis, no proven mutation. No drug from this app.

  • IDO1

    Enzyme

    First step from tryptophan to kynurenine. DecodeME does not name it. Newer measures see an active IDO, not a simple block.

  • IDO2

    Enzyme

    Sister of IDO1. Phair and Davis 2019: the hypothetical trap sits here. Not a DecodeME signal.

  • MAPK9 · NLGN1 · PTPRD

    Overlap

    Three genes that appear together in one ME analysis and in fatigue-dominant Long COVID. Candidates.

  • LAG3

    Gene, candidate

    A 2026 network paper. Sits on T-cell exhaustion. Not confirmed as a cause.

WASF3, PNAS 2023 · Muscle, Scheibenbogen and Wirth 2025 · IDO trap, Phair and Davis 2019

Defense

microRNA

MicroRNAs are short pieces of RNA. They do not build a protein. They turn other genes down. In ME/CFS they are not a Long COVID finding alone. A 2024 review of ME/CFS and fibromyalgia names microRNAs on the immune response, the mitochondria and oxidative stress, including miR-146a, miR-21, miR-150 and miR-29. A 2023 computation finds that the circulating microRNAs differ from person to person, yet point at the same gene cluster. Eight of the ten most central ones are raised by herpesviruses, including Epstein-Barr, even while the virus is latent. Epstein-Barr also makes its own microRNAs, from the BART and BHRF1 clusters, that help it evade immune defense. That is shown for the virus in general, not yet as a blood test in ME/CFS. A 2026 vesicle paper measures less let-7b in ME/CFS after COVID, together with fatigue and immune activation. The group measured is post-COVID. The same paper names Epstein-Barr as another trigger, and did not measure that group. Not a test, not a treatment.

Who

Carmen Scheibenbogen

Professor of immunology and deputy head of the Institute of Medical Immunology at Charité, head of the Charité Fatigue Center. Her work covers the EBV response, autoantibodies against β2-adrenergic and muscarinic receptors, reduced blood flow, and, with Klaus Wirth, a hypothesis that ties these findings to a mitochondrial energy shortfall. For her, ME/CFS (Myalgic Encephalomyelitis / Chronic Fatigue Syndrome) is a physical illness, not a psychosomatic label.

What is taken over

Only the cofactor trial

Described in public, including the February 2020 patient sheet with PD Dr Grabowski and lecture slides on mitochondria: B vitamins for four weeks, coenzyme Q10 at most 100 mg, D-ribose 3 × 5 g, NAC 2–3 × 600 mg. Also named, with no invented dose: B12, NADH, carnitine, arginine. A bridge toward symptom relief, explicitly not a causal treatment.

What it does not do

No off-label drugs

Scheibenbogen talks about medical off-label bridges until causal approaches are further along — autoimmunity, inflammation, low blood flow. Which substance that might be is a doctor's decision after findings. This app sets no drug dose.

Why a triangle

Three stations, NAC in the middle

The slide groups metabolism like this: the citric acid cycle with the B vitamins, the respiratory chain with Q10, ATP replenishment with ribose, and oxidative stress in between, where NAC sits. The classic vitamin triangle of D3, K2 and magnesium is a different model. It runs here only as an optional side module, because vitamin D in deficiency and magnesium as a cofactor of D activation are discussed apart from the mitochondrial core. K2 is the calcium partner of D3, not an established ME/CFS treatment, and it drops out under coumarins.

Evidence, briefly

Weak to preliminary

Metabolic papers (including Naviaux 2016, Fluge 2016 on PDH, Yamano 2016) describe disturbed energy pathways. They do not prove that capsules repair those pathways. Ribose rests on an open pilot study. Q10 plus NADH on small randomised trials, often with a small effect and sometimes a higher Q10 dose than Scheibenbogen names as a ceiling. NAC is mechanistically plausible and clinically thin. Pacing remains the step with the clearest practical priority, because post-exertional malaise can make the state worse.

Read on. The app does not replace this.

Places to start

From notes that have been published. Not a diagnosis, not a treatment, not a substitute for the doctor who treats you. If you get suddenly worse, use emergency medical care, not this app.

This app stores nothing you type. A question to the AI is not kept on the device. Not a diagnosis, not a treatment, not a shop.