Sodium and Calcium Accumulation and Mitochondrial Damage

A recent study from 2024 provided an advanced perspective on understanding Chronic Fatigue Syndrome (ME/CFS). The core findings suggest that hypoperfusion (reduced blood flow) and ischemia (inadequate blood supply) may lead to the hyper-accumulation of sodium and calcium within the skeletal muscles of these patients. Both hypoperfusion and ischemia describe conditions where blood supply to organs is impaired. This hypothesis proposes that the accumulation of sodium and calcium in skeletal muscles leads to mitochondrial damage—a theory that has been backed by empirical evidence.

The researchers in this study note that histological examinations ruled out muscle damage in ME/CFS patients being caused by ischemic hypoperfusion due to microvascular occlusion, viral presence, or immune myositis. This leaves “sodium-induced calcium hyper-accumulation” as the only known mechanism of damage resulting from exercise.

The study did not stop at explaining the condition; it also suggested, in light of the research, that inhibiting the acetylcholinesterase enzyme using the drug Mestinon (pyridostigmine) could offer real benefits to patients. Additionally, it proposed utilizing the guanylate cyclase stimulator Vericiguat to trigger vasodilation (widening of blood vessels) and improve red blood cell functionality.

A Biological Map for Understanding the Disease and the Role of Gut Bacteria

Other studies have identified a link between gut bacteria, the onset of the illness, and its symptoms. In a study from last year, artificial intelligence linked specific biological dysregulations to heterogeneous symptoms. The AI revealed how disruptions in gut microbiota metabolism (such as how it processes amino acids and fatty acids) directly correlate with changes in plasma lipids and the hyper-activation of inflammatory immune cells, specifically T cells. This provides a clear biological network map of how this disease operates.

Through this compiled biological network map, researchers view the causes as multifaceted. They cite viral infection as one of the primary triggers, such as the Epstein-Barr virus (EBV) or SARS viruses (including COVID-19).

Regarding proposed treatment paths, the map revealed that deficits in short-chain fatty acids and branched-chain amino acids (BCAAs) are directly linked to immune inflammation. This indicates that therapies aiming to restore these specific gut metabolites—such as targeted prebiotics, probiotics, or dietary interventions—could help calm the immune system.

Furthermore, the map explicitly connected increased inflammatory responses in specific T cell subsets to a decline in patient health. This map opens the door for therapies that specifically target or inhibit these exact inflammatory cells and the cytokines they secrete. Another recent study aligns with this direction, suggesting that altering the composition of gut microbiota could be a viable path toward treating Chronic Fatigue Syndrome. [1]

Chronic Fatigue Syndrome Treatment

Dozens of studies and trials have been conducted to evaluate the impact of various practices and medications on the symptoms of Chronic Fatigue Syndrome. However, there has been no conclusively effective cure that eliminates all or most symptoms, impacts a large percentage of patients, or offers sustained long-term improvement.

Certain antiviral agents have been trialed with limited results. Low doses of nortriptyline before bedtime improved sleep and slightly reduced pain. Steroids have shown mixed results among patients. Cognitive Behavioral Therapy (CBT) helped bring about improvement in 70% of patients who received more than 13 sessions, compared to fewer than 27% of those who received standard medical care alone.

Some exercise regimens have proven beneficial. Graded aerobic exercise programs recorded significant improvements in fatigue, functional status, and physical fitness in randomized controlled trials compared to flexibility and relaxation exercises. Additionally, raising awareness about the benefits of exercise proved effective in increasing patients’ overall activity levels.

[1] Source Quote: “The potential therapeutic approaches targeting gut health in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS): a narrative review.” Hsu, Chou-Yi, et al. Journal of Translational Medicine 23.1 (2025): 530.

This article is part of a series of articles on Chronic Fatigue Syndrome.