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South · Vitamin A Deficiency Test

Vitamin A Deficiency Test in North Carolina

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 North Carolina

Here is what you need before ordering and completing the Vitamin A Deficiency Test in NC. 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 North Carolina communities

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

Charlotte1,516,107Vitamin A Deficiency TestRaleigh1,062,018Vitamin A Deficiency TestWinston-Salem420,400Vitamin A Deficiency TestDurham399,762Vitamin A Deficiency TestGreensboro345,270Vitamin A Deficiency TestFayetteville328,827Vitamin A Deficiency TestAsheville316,694Vitamin A Deficiency TestConcord264,492Vitamin A Deficiency TestWilmington247,372Vitamin A Deficiency TestHickory211,042Vitamin A Deficiency TestGastonia194,190Vitamin A Deficiency TestHigh Point178,800Vitamin A Deficiency TestCary171,603Vitamin A Deficiency TestBurlington137,096Vitamin A Deficiency TestGreenville122,921Vitamin A Deficiency TestJacksonville108,549Vitamin A Deficiency TestRocky Mount61,952Vitamin A Deficiency TestChapel Hill60,920Vitamin A Deficiency TestHuntersville60,166Vitamin A Deficiency TestApex58,066Vitamin A Deficiency TestKannapolis52,173Vitamin A Deficiency TestMooresville48,431Vitamin A Deficiency TestWilson47,914Vitamin A Deficiency TestWake Forest46,387Vitamin A Deficiency TestHolly Springs40,198Vitamin A Deficiency TestIndian Trail39,603Vitamin A Deficiency TestSalisbury35,258Vitamin A Deficiency TestMonroe34,464Vitamin A Deficiency TestGoldsboro33,214Vitamin A Deficiency TestFuquay-Varina33,135Vitamin A Deficiency TestNew Bern31,058Vitamin A Deficiency TestCornelius30,925Vitamin A Deficiency TestGarner30,859Vitamin A Deficiency TestSanford30,024Vitamin A Deficiency TestMatthews29,417Vitamin A Deficiency TestMorrisville28,824Vitamin A Deficiency TestStatesville27,777Vitamin A Deficiency TestThomasville26,941Vitamin A Deficiency TestAsheboro26,729Vitamin A Deficiency TestKernersville26,376Vitamin A Deficiency TestMint Hill26,236Vitamin A Deficiency TestClayton25,486Vitamin A Deficiency TestLeland22,794Vitamin A Deficiency TestShelby21,564Vitamin A Deficiency TestCarrboro21,237Vitamin A Deficiency TestClemmons21,032Vitamin A Deficiency TestKinston19,888Vitamin A Deficiency TestWaxhaw19,645Vitamin A Deficiency TestLexington19,347Vitamin A Deficiency TestLumberton19,186Vitamin A Deficiency TestKnightdale18,614Vitamin A Deficiency TestElizabeth City18,466Vitamin A Deficiency TestHarrisburg18,415Vitamin A Deficiency TestLenoir18,205Vitamin A Deficiency TestBoone18,055Vitamin A Deficiency TestHavelock17,570Vitamin A Deficiency TestHope Mills17,421Vitamin A Deficiency TestMorganton17,389Vitamin A Deficiency TestMount Holly17,315Vitamin A Deficiency TestPinehurst17,250Vitamin A Deficiency Test