Where Histidine is reported
Also listed as: Amino acid
| Condition | Direction | Compared against | Associated symptoms | Source |
|---|---|---|---|---|
| Long COVID | ↓ reduced | recovered individuals without persistent symptoms | Amino acid metabolism | Saito et al. 2024 |
Frequently asked questions
In which conditions is Histidine altered?
In the OSMF atlas Histidine is reported in Long COVID. It is reduced in 1 across 1 entries.
Is there a standard clinical test for Histidine?
The atlas entries for Histidine 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 Histidine 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
Subscribe on Substack
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.