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Midwest · Vitamin C Test – Vitamin Deficiency Testing

Vitamin C Test – Vitamin Deficiency Testing in Illinois

Below is a plain-language overview of the vitamin c test – vitamin deficiency testing. A vitamin C test measures the amount of vitamin C in your blood to help evaluate whether your levels are adequate. It is typically used when a deficiency is suspected based on symptoms or dietary history.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in Illinois

Here is what you need before ordering and completing the Vitamin C Test – Vitamin Deficiency Testing in IL. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Fasting is required for this test — follow the collection lab's instructions.
Preparation
Preparation instructions can vary, so follow the specific directions provided by the collection laboratory. This may include fasting or avoiding certain foods or supplements before the test.
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

This blood test quantifies the concentration of vitamin C, also known as ascorbic acid, in your bloodstream. It is used to assess vitamin C status and can help identify a deficiency. The test is not a routine screening tool for most healthy individuals.

What it measures

  • Vitamin C (ascorbic acid) — reflects the amount of vitamin C circulating in the blood

What the test involves

The test requires a standard blood draw, usually from a vein in your arm. The sample is then sent to a laboratory for analysis.

Why it is often ordered

A clinician may order this test if you have symptoms that could suggest a vitamin C deficiency, such as easy bruising, bleeding gums, or poor wound healing. It may also be ordered for individuals with limited dietary intake or certain medical conditions that affect nutrient absorption.

Preparation

Preparation instructions can vary, so follow the specific directions provided by the collection laboratory. This may include fasting or avoiding certain foods or supplements before the test.

How results are reported

Results are reported as a numerical value that indicates your vitamin C level. Reference ranges can differ between laboratories, so your result should be interpreted in the context of the range provided by the testing lab.

Before you go

  • Whether fasting is required before the test
  • Any medications or supplements that might affect results
  • The specific reference range used by the testing laboratory

Cities

Vitamin C Test – Vitamin Deficiency Testing in Illinois communities

Choose your city for local context and to order this test.

Chicago8,595,181Vitamin C Test – Vitamin Deficiency TestingRockford289,763Vitamin C Test – Vitamin Deficiency TestingRound Lake Beach287,012Vitamin C Test – Vitamin Deficiency TestingPeoria255,718Vitamin C Test – Vitamin Deficiency TestingAurora183,447Vitamin C Test – Vitamin Deficiency TestingSpringfield162,588Vitamin C Test – Vitamin Deficiency TestingChampaign153,278Vitamin C Test – Vitamin Deficiency TestingJoliet150,323Vitamin C Test – Vitamin Deficiency TestingNaperville149,013Vitamin C Test – Vitamin Deficiency TestingBloomington134,357Vitamin C Test – Vitamin Deficiency TestingElgin114,156Vitamin C Test – Vitamin Deficiency TestingWaukegan89,751Vitamin C Test – Vitamin Deficiency TestingDecatur88,002Vitamin C Test – Vitamin Deficiency TestingCicero84,905Vitamin C Test – Vitamin Deficiency TestingAlton83,705Vitamin C Test – Vitamin Deficiency TestingKankakee82,095Vitamin C Test – Vitamin Deficiency TestingEvanston78,454Vitamin C Test – Vitamin Deficiency TestingSchaumburg78,053Vitamin C Test – Vitamin Deficiency TestingArlington Heights77,283Vitamin C Test – Vitamin Deficiency TestingBolingbrook73,807Vitamin C Test – Vitamin Deficiency TestingPalatine67,754Vitamin C Test – Vitamin Deficiency TestingSkokie67,444Vitamin C Test – Vitamin Deficiency TestingDeKalb66,624Vitamin C Test – Vitamin Deficiency TestingCarbondale66,482Vitamin C Test – Vitamin Deficiency TestingDes Plaines60,413Vitamin C Test – Vitamin Deficiency TestingOrland Park58,622Vitamin C Test – Vitamin Deficiency TestingOak Lawn58,032Vitamin C Test – Vitamin Deficiency TestingBerwyn56,960Vitamin C Test – Vitamin Deficiency TestingMount Prospect56,510Vitamin C Test – Vitamin Deficiency TestingTinley Park55,988Vitamin C Test – Vitamin Deficiency TestingOak Park54,100Vitamin C Test – Vitamin Deficiency TestingWheaton53,762Vitamin C Test – Vitamin Deficiency TestingNormal53,446Vitamin C Test – Vitamin Deficiency TestingHoffman Estates52,153Vitamin C Test – Vitamin Deficiency TestingDowners Grove50,209Vitamin C Test – Vitamin Deficiency TestingGlenview48,150Vitamin C Test – Vitamin Deficiency TestingElmhurst45,661Vitamin C Test – Vitamin Deficiency TestingLombard44,311Vitamin C Test – Vitamin Deficiency TestingPlainfield44,296Vitamin C Test – Vitamin Deficiency TestingBuffalo Grove43,062Vitamin C Test – Vitamin Deficiency TestingMoline42,660Vitamin C Test – Vitamin Deficiency TestingBelleville42,463Vitamin C Test – Vitamin Deficiency TestingBartlett41,126Vitamin C Test – Vitamin Deficiency TestingRomeoville40,099Vitamin C Test – Vitamin Deficiency TestingCrystal Lake40,082Vitamin C Test – Vitamin Deficiency TestingCarol Stream39,895Vitamin C Test – Vitamin Deficiency TestingStreamwood39,736Vitamin C Test – Vitamin Deficiency TestingQuincy39,687Vitamin C Test – Vitamin Deficiency TestingPark Ridge39,562Vitamin C Test – Vitamin Deficiency TestingUrbana39,189Vitamin C Test – Vitamin Deficiency TestingWheeling39,104Vitamin C Test – Vitamin Deficiency TestingCarpentersville37,940Vitamin C Test – Vitamin Deficiency TestingHanover Park37,545Vitamin C Test – Vitamin Deficiency TestingRock Island37,519Vitamin C Test – Vitamin Deficiency TestingCalumet City36,065Vitamin C Test – Vitamin Deficiency TestingAddison35,999Vitamin C Test – Vitamin Deficiency TestingNorthbrook35,108Vitamin C Test – Vitamin Deficiency TestingOswego34,324Vitamin C Test – Vitamin Deficiency TestingWoodridge34,161Vitamin C Test – Vitamin Deficiency TestingGlendale Heights33,443Vitamin C Test – Vitamin Deficiency Testing