Where Arginine is reported
Also listed as: Amino acid
| Condition | Direction | Compared against | Associated symptoms | Source |
|---|---|---|---|---|
| Long COVID | ↓ reduced | healthy controls | NO pathway, immune function | Saito et al. 2024 |
Frequently asked questions
In which conditions is Arginine altered?
In the OSMF atlas Arginine is reported in Long COVID. It is reduced in 1 across 1 entries.
Is there a standard clinical test for Arginine?
The atlas entries for Arginine 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 Arginine 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.
Cite this page
Open Source Medicine Foundation. (2026). Arginine across conditions: biomarker evidence. OSMF Research Tracker. Retrieved October 7, 2026, from https://research.opensourcemed.info/biomarkers/markers/arginine.html
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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.