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Midwest · Vitamin A Deficiency Test

Vitamin A Deficiency Test in Illinois

This page explains the vitamin a deficiency test, what it measures, and how to order it. This blood test measures vitamin A levels to help evaluate for a deficiency. It is typically ordered when symptoms suggest low vitamin A or when a person has risk factors.

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 A Deficiency Test 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
Some tests require fasting or avoiding certain foods or drinks beforehand. You will be informed when you order — confirm the details with the collection lab.
Preparation
Preparation instructions can vary, so follow the specific directions provided by the collection lab. Typically, no special preparation is needed, but the lab will confirm any requirements.
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

The vitamin A deficiency test is a blood test that measures the amount of retinol, the primary form of vitamin A, in the blood. It helps assess whether vitamin A stores are adequate for normal vision, immune function, and skin health.

What it measures

  • Retinol — reflects circulating vitamin A levels
  • Retinol-binding protein — indicates vitamin A transport capacity
  • Total vitamin A — may include other retinoid forms

What the test involves

A healthcare professional collects a blood sample, usually from a vein in your arm, using a standard blood draw. 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 such as night blindness, dry eyes, or frequent infections that could indicate low vitamin A. It may also be ordered for individuals with conditions that affect nutrient absorption or those with limited dietary intake.

Preparation

Preparation instructions can vary, so follow the specific directions provided by the collection lab. Typically, no special preparation is needed, but the lab will confirm any requirements.

How results are reported

Results are reported as a numerical value that your clinician interprets. Reference ranges can differ between laboratories, so the lab's own range should be used for context.

Before you go

  • Whether fasting is required before the blood draw
  • Any medications or supplements that might affect results
  • The expected turnaround time for results

Cities

Vitamin A Deficiency Test in Illinois communities

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

Chicago8,595,181Vitamin A Deficiency TestRockford289,763Vitamin A Deficiency TestRound Lake Beach287,012Vitamin A Deficiency TestPeoria255,718Vitamin A Deficiency TestAurora183,447Vitamin A Deficiency TestSpringfield162,588Vitamin A Deficiency TestChampaign153,278Vitamin A Deficiency TestJoliet150,323Vitamin A Deficiency TestNaperville149,013Vitamin A Deficiency TestBloomington134,357Vitamin A Deficiency TestElgin114,156Vitamin A Deficiency TestWaukegan89,751Vitamin A Deficiency TestDecatur88,002Vitamin A Deficiency TestCicero84,905Vitamin A Deficiency TestAlton83,705Vitamin A Deficiency TestKankakee82,095Vitamin A Deficiency TestEvanston78,454Vitamin A Deficiency TestSchaumburg78,053Vitamin A Deficiency TestArlington Heights77,283Vitamin A Deficiency TestBolingbrook73,807Vitamin A Deficiency TestPalatine67,754Vitamin A Deficiency TestSkokie67,444Vitamin A Deficiency TestDeKalb66,624Vitamin A Deficiency TestCarbondale66,482Vitamin A Deficiency TestDes Plaines60,413Vitamin A Deficiency TestOrland Park58,622Vitamin A Deficiency TestOak Lawn58,032Vitamin A Deficiency TestBerwyn56,960Vitamin A Deficiency TestMount Prospect56,510Vitamin A Deficiency TestTinley Park55,988Vitamin A Deficiency TestOak Park54,100Vitamin A Deficiency TestWheaton53,762Vitamin A Deficiency TestNormal53,446Vitamin A Deficiency TestHoffman Estates52,153Vitamin A Deficiency TestDowners Grove50,209Vitamin A Deficiency TestGlenview48,150Vitamin A Deficiency TestElmhurst45,661Vitamin A Deficiency TestLombard44,311Vitamin A Deficiency TestPlainfield44,296Vitamin A Deficiency TestBuffalo Grove43,062Vitamin A Deficiency TestMoline42,660Vitamin A Deficiency TestBelleville42,463Vitamin A Deficiency TestBartlett41,126Vitamin A Deficiency TestRomeoville40,099Vitamin A Deficiency TestCrystal Lake40,082Vitamin A Deficiency TestCarol Stream39,895Vitamin A Deficiency TestStreamwood39,736Vitamin A Deficiency TestQuincy39,687Vitamin A Deficiency TestPark Ridge39,562Vitamin A Deficiency TestUrbana39,189Vitamin A Deficiency TestWheeling39,104Vitamin A Deficiency TestCarpentersville37,940Vitamin A Deficiency TestHanover Park37,545Vitamin A Deficiency TestRock Island37,519Vitamin A Deficiency TestCalumet City36,065Vitamin A Deficiency TestAddison35,999Vitamin A Deficiency TestNorthbrook35,108Vitamin A Deficiency TestOswego34,324Vitamin A Deficiency TestWoodridge34,161Vitamin A Deficiency TestGlendale Heights33,443Vitamin A Deficiency Test