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 Florida

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 Florida

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

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

Miami5,711,945Vitamin A Deficiency TestTampa2,683,956Vitamin A Deficiency TestOrlando1,927,699Vitamin A Deficiency TestJacksonville1,220,191Vitamin A Deficiency TestSarasota727,388Vitamin A Deficiency TestCape Coral682,773Vitamin A Deficiency TestPalm Bay528,322Vitamin A Deficiency TestPort St. Lucie468,979Vitamin A Deficiency TestPalm Coast403,834Vitamin A Deficiency TestKissimmee399,929Vitamin A Deficiency TestPensacola360,711Vitamin A Deficiency TestBonita Springs347,581Vitamin A Deficiency TestLakeland308,994Vitamin A Deficiency TestSt. Petersburg258,245Vitamin A Deficiency TestTallahassee257,648Vitamin A Deficiency TestWinter Haven240,768Vitamin A Deficiency TestHialeah224,362Vitamin A Deficiency TestNavarre223,951Vitamin A Deficiency TestNorth Port221,616Vitamin A Deficiency TestGainesville213,287Vitamin A Deficiency TestDeltona212,616Vitamin A Deficiency TestFort Lauderdale182,247Vitamin A Deficiency TestSpring Hill179,668Vitamin A Deficiency TestVero Beach South174,748Vitamin A Deficiency TestOcala174,618Vitamin A Deficiency TestPembroke Pines170,346Vitamin A Deficiency TestLeesburg154,301Vitamin A Deficiency TestHollywood152,597Vitamin A Deficiency TestPanama City149,366Vitamin A Deficiency TestMiramar134,306Vitamin A Deficiency TestCoral Springs133,693Vitamin A Deficiency TestLehigh Acres123,751Vitamin A Deficiency TestThe Villages119,296Vitamin A Deficiency TestClearwater116,616Vitamin A Deficiency TestWest Palm Beach115,877Vitamin A Deficiency TestBrandon115,330Vitamin A Deficiency TestMiami Gardens111,706Vitamin A Deficiency TestPompano Beach111,423Vitamin A Deficiency TestDavie104,782Vitamin A Deficiency TestRiverview98,928Vitamin A Deficiency TestSunrise96,220Vitamin A Deficiency TestBoca Raton95,347Vitamin A Deficiency TestPlantation92,212Vitamin A Deficiency TestAlafaya92,080Vitamin A Deficiency TestTown 'n' Country89,679Vitamin A Deficiency TestHomosassa Springs86,578Vitamin A Deficiency TestDeerfield Beach86,062Vitamin A Deficiency TestFort Myers84,694Vitamin A Deficiency TestPine Hills84,289Vitamin A Deficiency TestMelbourne83,500Vitamin A Deficiency TestMiami Beach83,469Vitamin A Deficiency TestLargo82,505Vitamin A Deficiency TestZephyrhills79,795Vitamin A Deficiency TestBoynton Beach79,479Vitamin A Deficiency TestHomestead78,885Vitamin A Deficiency TestSt. Augustine78,386Vitamin A Deficiency TestKendall78,007Vitamin A Deficiency TestLauderhill73,935Vitamin A Deficiency TestDoral73,126Vitamin A Deficiency TestTamarac71,140Vitamin A Deficiency Test