Lab test requirements · preparation, ID, referral, and timing United States · 0 communities
LabRequirements Know what your test requires

South · Vitamin A Deficiency Test

Vitamin A Deficiency Test in Louisiana

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 Louisiana

Here is what you need before ordering and completing the Vitamin A Deficiency Test in LA. 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 Louisiana communities

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

New Orleans925,443Vitamin A Deficiency TestBaton Rouge610,751Vitamin A Deficiency TestShreveport286,200Vitamin A Deficiency TestLafayette254,286Vitamin A Deficiency TestLake Charles150,036Vitamin A Deficiency TestHouma146,665Vitamin A Deficiency TestMetairie140,590Vitamin A Deficiency TestMonroe117,197Vitamin A Deficiency TestMandeville105,097Vitamin A Deficiency TestSlidell94,498Vitamin A Deficiency TestAlexandria75,835Vitamin A Deficiency TestHammond75,688Vitamin A Deficiency TestKenner66,411Vitamin A Deficiency TestBossier City63,168Vitamin A Deficiency TestPrairieville34,118Vitamin A Deficiency TestMarrero31,928Vitamin A Deficiency TestCentral29,746Vitamin A Deficiency TestLaplace29,129Vitamin A Deficiency TestNew Iberia28,844Vitamin A Deficiency TestTerrytown25,388Vitamin A Deficiency TestRuston22,286Vitamin A Deficiency TestChalmette21,981Vitamin A Deficiency TestBayou Cane21,699Vitamin A Deficiency TestSulphur21,490Vitamin A Deficiency TestHarvey20,942Vitamin A Deficiency TestShenandoah20,068Vitamin A Deficiency TestZachary19,278Vitamin A Deficiency TestNatchitoches18,105Vitamin A Deficiency TestGretna17,836Vitamin A Deficiency TestEstelle17,650Vitamin A Deficiency TestOpelousas15,884Vitamin A Deficiency TestThibodaux15,242Vitamin A Deficiency TestYoungsville15,167Vitamin A Deficiency TestPineville14,653Vitamin A Deficiency TestLuling14,115Vitamin A Deficiency TestRiver Ridge13,435Vitamin A Deficiency TestClaiborne13,147Vitamin A Deficiency TestWest Monroe13,103Vitamin A Deficiency TestBroussard12,960Vitamin A Deficiency TestBaker12,736Vitamin A Deficiency TestMinden12,145Vitamin A Deficiency TestGonzales12,080Vitamin A Deficiency TestCrowley11,916Vitamin A Deficiency TestDestrehan11,827Vitamin A Deficiency TestMorgan City11,525Vitamin A Deficiency TestMoss Bluff11,453Vitamin A Deficiency TestWoodmere11,343Vitamin A Deficiency TestAbbeville11,313Vitamin A Deficiency TestBayou Blue11,229Vitamin A Deficiency TestWaggaman11,161Vitamin A Deficiency TestCovington11,155Vitamin A Deficiency TestRaceland11,002Vitamin A Deficiency TestGardere10,971Vitamin A Deficiency TestBogalusa10,921Vitamin A Deficiency TestTimberlane10,697Vitamin A Deficiency TestJefferson10,500Vitamin A Deficiency TestBelle Chasse10,406Vitamin A Deficiency TestDeRidder10,060Vitamin A Deficiency TestBastrop9,879Vitamin A Deficiency TestJennings9,836Vitamin A Deficiency Test