Where Sarcosine is reported
Also listed as: Methylglycine
| Condition | Direction | Compared against | Associated symptoms | Source |
|---|---|---|---|---|
| Long COVID | ↓ reduced | healthy controls, recovered individuals without persistent symptoms | Depression, anxiety, brain fog | Saito et al. 2024 |
| ME/CFS | ↓ reduced | healthy controls; long COVID overlap | Brain fog, depression | Saito et al. 2024 |
Frequently asked questions
In which conditions is Sarcosine altered?
In the OSMF atlas Sarcosine is reported in Long COVID, ME/CFS. It is reduced in 2 across 2 entries.
Does Sarcosine point to one specific diagnosis?
No. Because Sarcosine changes in several conditions (Long COVID, ME/CFS), an abnormal result cannot identify which condition, if any, is present. It must be interpreted with symptoms, history and other tests.
Is there a standard clinical test for Sarcosine?
The atlas entries for Sarcosine do not carry a LOINC code, which usually means the marker was measured with research assays or study-specific methods rather than a routine clinical panel.
Is one abnormal Sarcosine result diagnostic?
No single biomarker result is diagnostic of any of these conditions. Findings reflect group averages from published cohorts with substantial overlap between patients and controls.
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Last reviewed: 2026-06-29 · Browse: Biomarker Index · All marker pages · Biomarker Atlas
Disclaimer: Educational synthesis of peer-reviewed research; not medical advice. Findings are group-level and vary with study design. Discuss any result with a qualified clinician.