Biomarkers · Chemical
Caffeine
- Also listed as
- CAFFEINE, SERUM
- Primary unit
- ug/mL
- LOINC codes
- 3422-3, 3424-9
- Tests that measure Caffeine
- Labcorp 2, Quest Diagnostics 1
Tests
Check the catalog code, specimen, method and preparation for every test that measures Caffeine. Select up to five tests to compare them side by side.
Labcorp 2 tests
Single-analyte tests
Caffeine, Serum or Plasma 071258
Serum · Fasting not stated · Turnaround 2 - 3 days
Labcorp catalog pageMethod and collection
- Method
- Immunoassay (IA)
- Collection
- Transfer separated serum or plasma to a plastic transport tube.
- Reference notes
- 8.0–20.0 µg/mL
Caffeine, Urine 791746
Urine · Fasting not stated · Turnaround 3 - 5 days
Labcorp catalog pageMethod and collection
- Method
- Immunoassay (IA)
Quest Diagnostics 1 test
Single-analyte tests
Caffeine 305
Serum · Fasting not stated · Turnaround Set up: Mon-Fri
Quest Diagnostics catalog pageMethod and collection
- Method
- Immunoassay (IA)
- Preparation
- Collect as a trough just prior to next dose
- Reference notes
- 8.0-20.0 mg/L
0 of 5 tests selected
Pick one moreSources
Check the guidelines, studies and lab catalogs behind every range and link on this page. Open a source to see each claim it backs.
Lab catalogs
Labcorp test menu
Labcorp
Test catalog: 2 tests, with codes, specimens, methods and reference intervals
Quest Diagnostics test menu
Quest Diagnostics
Test catalog: 1 tests, with codes, specimens, methods and reference intervals
Codes and registries
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for Caffeine
Registered studies that measure Caffeine, on the U.S. National Library of Medicine registry.
Verify these ranges and sources
We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.
Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.
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