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Mountain West · Vitamin A Deficiency Test

Vitamin A Deficiency Test in Idaho

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 Idaho

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

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

Boise422,665Vitamin A Deficiency TestNampa194,547Vitamin A Deficiency TestMeridian115,227Vitamin A Deficiency TestCoeur d'Alene114,880Vitamin A Deficiency TestIdaho Falls101,326Vitamin A Deficiency TestPocatello74,359Vitamin A Deficiency TestCaldwell58,872Vitamin A Deficiency TestTwin Falls51,223Vitamin A Deficiency TestPost Falls38,162Vitamin A Deficiency TestLewiston33,964Vitamin A Deficiency TestRexburg33,684Vitamin A Deficiency TestEagle29,665Vitamin A Deficiency TestMoscow25,336Vitamin A Deficiency TestKuna23,765Vitamin A Deficiency TestAmmon17,401Vitamin A Deficiency TestMountain Home15,863Vitamin A Deficiency TestChubbuck15,445Vitamin A Deficiency TestHayden15,316Vitamin A Deficiency TestJerome12,182Vitamin A Deficiency TestBlackfoot12,106Vitamin A Deficiency TestGarden City12,056Vitamin A Deficiency TestBurley11,274Vitamin A Deficiency TestStar10,929Vitamin A Deficiency TestRathdrum9,099Vitamin A Deficiency TestMiddleton9,091Vitamin A Deficiency TestHailey9,001Vitamin A Deficiency TestSandpoint8,448Vitamin A Deficiency TestPayette7,999Vitamin A Deficiency TestEmmett7,408Vitamin A Deficiency TestRupert5,994Vitamin A Deficiency TestFruitland5,903Vitamin A Deficiency TestWeiser5,578Vitamin A Deficiency TestPreston5,545Vitamin A Deficiency TestRigby4,920Vitamin A Deficiency TestShelley4,784Vitamin A Deficiency TestBuhl4,532Vitamin A Deficiency TestAmerican Falls4,531Vitamin A Deficiency TestKimberly4,508Vitamin A Deficiency TestLincoln3,919Vitamin A Deficiency TestSt. Anthony3,677Vitamin A Deficiency TestGooding3,625Vitamin A Deficiency TestHeyburn3,592Vitamin A Deficiency TestMcCall3,568Vitamin A Deficiency TestKetchum3,448Vitamin A Deficiency TestHidden Springs3,382Vitamin A Deficiency TestVictor3,315Vitamin A Deficiency TestGrangeville3,296Vitamin A Deficiency TestOrofino3,216Vitamin A Deficiency TestSalmon3,114Vitamin A Deficiency TestSoda Springs3,084Vitamin A Deficiency TestSt. Maries2,951Vitamin A Deficiency TestMountain Home AFB2,863Vitamin A Deficiency TestWendell2,859Vitamin A Deficiency TestHomedale2,845Vitamin A Deficiency TestAberdeen2,795Vitamin A Deficiency TestFiler2,734Vitamin A Deficiency TestIona2,640Vitamin A Deficiency TestMontpelier2,610Vitamin A Deficiency TestBellevue2,508Vitamin A Deficiency TestFort Hall2,499Vitamin A Deficiency Test