Biomarker Lens

Common biomarkers

  • Hemoglobin
  • Glucose
  • ALT
  • Apolipoprotein B
  • C-Reactive Protein, Cardiac
  • Ferritin
  • Alb/Creat Ratio, Urine
  • Alkaline Phosphatase
  • FSH
  • T4,Free(Direct)

Biomarkers · Chemical

Vitamin C

Primary unit
mg/dL
LOINC codes
1903-4
Tests that measure Vitamin C
Quest Diagnostics 3, Labcorp 2

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Micronutrient, Vitamin C 10181

PopulationInterval
Male ≥18 years0.2-2.1 mg/dL
Female ≥18 years0.3-2.7 mg/dL

Quest Diagnostics test catalog, 10181

Quest Diagnostics, Vitamin C 929

PopulationInterval
Female0.3-2.7 mg/dL
Male0.2-2.1 mg/dL

Quest Diagnostics test catalog, 929

Tests

Check the catalog code, specimen, method and preparation for every test that measures Vitamin C. Select up to five tests to compare them side by side.

Quest Diagnostics 3 tests

Single-analyte tests

  • Micronutrient, Vitamin C 10181

    Serum · Fasting not stated · Turnaround Set up: Tues-Sat

    Method and collection
    Method
    Chromatography/Mass Spectrometry
    Preparation
    Overnight fasting is preferred. Refrain from eating fruits and from taking vitamin C supplements for 24 hours prior to collection.
    Collection
    Patients should be 18 years of age or greater. Centrifuge within 1 hour of collection. Immediately separate serum from the cells into a clean, plastic transport tube. Freeze. Protect from light. If unable to centrifuge immediately, sample should be covered with aluminum foil and placed on ice until serum can be separated from cells. Transport to the laboratory frozen. For remote collection sites, or those with no access to ultra-low freezers or dry ice, it is recommended to schedule patient visits/draws after 12:00 p.m. local time and store the samples at -10 ° C to -30° C freezers (stable for 8 hours) until picked up by courier. Couriers should then transfer samples to -70° C storage (on dry ice) while enroute to the performing site location.
    Quest Diagnostics catalog page

  • Vitamin C 929

    Serum · Fasting not stated · Turnaround Set up: Tues-Sat

    Method and collection
    Method
    Chromatography/Mass Spectrometry
    Preparation
    Overnight fasting is preferred. Refrain from eating fruits and from taking vitamin C supplements for 24 hours prior to collection.
    Collection
    Centrifuge within 1 hour of collection. Immediately separate serum from the cells into a clean, plastic transport tube. Freeze. Protect from light. If unable to centrifuge immediately, sample should be covered with aluminum foil immediately and placed on ice until serum can be separated from cells. Transport to the laboratory frozen. For remote collection sites, or those with no access to ultra-low freezers or dry ice, it is recommended to schedule patient visits/draws after 12:00 p.m. local time and store the samples at -10° C to -30° C freezers (stable for 8 hours) until picked up by courier. Couriers should then transfer samples to -70° C storage (on dry ice) while enroute to the performing site location.
    Quest Diagnostics catalog page

Panels that include this biomarker

  • Micronutrients, Antioxidants Panel 10187

    4 analytes · Serum · Fasting required

    Method and collection
    Method
    Chromatography • Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
    Preparation
    Overnight fasting required. Avoid taking Coenzyme Q10 supplements the morning of the test. Refrain from eating fruits or taking vitamin C supplements 24 hours prior to collection.
    Collection
    Patients should be 18 years of age or greater. Gently invert specimen 5 times (DO NOT SHAKE!), allow to clot for 30-60 minutes at room temperature, centrifuge 10 minutes. Separate serum into 3 amber plastic transport tubes: 1 mL (0.5 mL min) for Vitamin A and E, protect from light, ship frozen (can be refrigerated). 1 mL (0.5 mL min) for Vitamin C, freeze immediately, protect from light, ship frozen. 1 mL (0.5 mL min) for CoQ10, protect from light, ship refrigerated. Do not ship on dry ice. Coenzyme Q10 must NOT be shipped on dry ice. Vitamin C must be shipped on dry ice. Additionally, for remote collection sites, or those with no access to ultra-low freezers or dry ice, it is recommended to schedule patient visits/draws after 12:00 p.m. local time and store the samples at -10° C to -30° C freezers (stable for 8 hours) until picked up by courier. Couriers should then transfer samples to -70° C storage (on dry ice) while enroute to the performing site location.
    Reference notes
    Coenzyme Q10 (CoQ10) | >35 ug/mL Vitamin A (Retinol) 18-19 years | 26-72 mcg/dL >19 years | 38-98 mcg/dL Reference range not available for individuals <18 years for this micronutrient test. Vitamin C Male ≥18 years | 0.2-2.1 mg/dL Female ≥18 years | 0.3-2.7 mg/dL Reference range not available for individuals <18 years for this micronutrient test. Vitamin E Vitamin E, Alpha Tocopherol | ≥18 years | 5.7-19.9 mg/L Vitamin E, Beta-Gamma Tocopherol | ≥18 years | <4.4 mg/L Reference range not available for individuals <18 years for this micronutrient test.
    Quest Diagnostics catalog page

Labcorp 2 tests

Single-analyte tests

  • Vitamin C 001805

    Plasma · Fasting not stated · Turnaround 3 - 5 days

    Method and collection
    Method
    Liquid chromatography-tandem mass spectrometry (LC/MS-MS)
    Collection
    Collect blood by venipuncture into a green-top containing lithium heparin and mix immediately by gentle inversion at least six times to ensure adequate mixing. Plasma must be separated from cells immediately after venipuncture and transferred to light-protected amber plastic tube. Separated plasma must be placed on dry ice for shipment within 4 hours of separation. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
    Reference notes
    0.4–2.0 mg/dL
    Labcorp catalog page

  • Vitamin C (with Dilution) 123420

    Plasma · Fasting not stated · Turnaround 3 - 5 days

    Method and collection
    Method
    Liquid chromatography-tandem mass spectrometry (LC/MS-MS)
    Collection
    Collect blood by venipuncture into a green-top containing lithium heparin and mix immediately by gentle inversion at least six times to ensure adequate mixing. Plasma must be separated from cells immediately after venipuncture and transferred to light-protected amber plastic tube. Separated plasma must be placed on dry ice for shipment within 4 hours of separation. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
    Reference notes
    0.4–2.0 mg/dL
    Labcorp catalog page

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Sources

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.

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