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South · Selenium Blood Test – Deficiency Testing

Selenium Blood Test – Deficiency Testing in Texas

This page explains the selenium blood test – deficiency testing, what it measures, and how to order it. A selenium blood test measures the amount of selenium in your blood. It can help assess exposure or nutritional status.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in Texas

Here is what you need before ordering and completing the Selenium Blood Test – Deficiency Testing in TX. 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
Fasting is required for this test — follow the collection lab's instructions.
Preparation
Your lab will provide specific instructions, which may include fasting or avoiding certain supplements. Always follow the collection lab's guidance.
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

This test quantifies selenium, a trace mineral that acts as an antioxidant and supports thyroid and immune function. It is used to monitor industrial exposure or to evaluate a possible deficiency.

What it measures

  • Selenium — Reflects recent selenium intake and body status.
  • Selenium level — Used to assess deficiency or excess exposure.
  • Whole blood selenium — Measures selenium in whole blood, which may better reflect long-term status.

What the test involves

A healthcare professional collects a small sample of blood, usually from a vein in your arm. 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 of deficiency, such as muscle weakness or hair loss, or if you work with selenium in an industrial setting. It can also be part of a nutritional assessment.

Preparation

Your lab will provide specific instructions, which may include fasting or avoiding certain supplements. Always follow the collection lab's guidance.

How results are reported

Results are reported as a concentration of selenium in your blood, often in micrograms per deciliter or micromoles per liter. Reference ranges vary by laboratory, so your result should be interpreted in the context of the lab's own range.

Before you go

  • Whether fasting is required before the test
  • If you should avoid certain supplements or foods
  • How and when you will receive your results

Cities

Selenium Blood Test – Deficiency Testing in Texas communities

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

Dallas5,668,165Selenium Blood Test – Deficiency TestingHouston5,650,910Selenium Blood Test – Deficiency TestingSan Antonio1,910,785Selenium Blood Test – Deficiency TestingAustin1,659,251Selenium Blood Test – Deficiency TestingFort Worth908,469Selenium Blood Test – Deficiency TestingMcAllen809,002Selenium Blood Test – Deficiency TestingEl Paso794,344Selenium Blood Test – Deficiency TestingDenton445,814Selenium Blood Test – Deficiency TestingArlington392,304Selenium Blood Test – Deficiency TestingCorpus Christi333,764Selenium Blood Test – Deficiency TestingThe Woodlands292,380Selenium Blood Test – Deficiency TestingPlano282,181Selenium Blood Test – Deficiency TestingLubbock259,946Selenium Blood Test – Deficiency TestingLaredo256,748Selenium Blood Test – Deficiency TestingIrving254,184Selenium Blood Test – Deficiency TestingMcKinney248,840Selenium Blood Test – Deficiency TestingGarland245,075Selenium Blood Test – Deficiency TestingKilleen238,288Selenium Blood Test – Deficiency TestingBrownsville235,735Selenium Blood Test – Deficiency TestingCollege Station207,514Selenium Blood Test – Deficiency TestingAmarillo204,357Selenium Blood Test – Deficiency TestingGrand Prairie195,992Selenium Blood Test – Deficiency TestingFrisco193,140Selenium Blood Test – Deficiency TestingWaco187,172Selenium Blood Test – Deficiency TestingPort Arthur156,988Selenium Blood Test – Deficiency TestingPasadena151,964Selenium Blood Test – Deficiency TestingMesquite149,848Selenium Blood Test – Deficiency TestingHarlingen148,545Selenium Blood Test – Deficiency TestingTyler143,895Selenium Blood Test – Deficiency TestingBeaumont137,549Selenium Blood Test – Deficiency TestingOdessa134,793Selenium Blood Test – Deficiency TestingCarrollton131,388Selenium Blood Test – Deficiency TestingMidland130,765Selenium Blood Test – Deficiency TestingAbilene125,474Selenium Blood Test – Deficiency TestingPearland122,609Selenium Blood Test – Deficiency TestingTexas City122,017Selenium Blood Test – Deficiency TestingRound Rock117,735Selenium Blood Test – Deficiency TestingRichardson115,904Selenium Blood Test – Deficiency TestingTemple115,809Selenium Blood Test – Deficiency TestingLeague City111,847Selenium Blood Test – Deficiency TestingSugar Land110,272Selenium Blood Test – Deficiency TestingLewisville110,077Selenium Blood Test – Deficiency TestingAllen102,778Selenium Blood Test – Deficiency TestingWichita Falls102,563Selenium Blood Test – Deficiency TestingSan Angelo100,330Selenium Blood Test – Deficiency TestingEdinburg98,759Selenium Blood Test – Deficiency TestingLongview98,075Selenium Blood Test – Deficiency TestingConroe87,930Selenium Blood Test – Deficiency TestingNew Braunfels87,549Selenium Blood Test – Deficiency TestingMission85,311Selenium Blood Test – Deficiency TestingBryan85,204Selenium Blood Test – Deficiency TestingAtascocita84,222Selenium Blood Test – Deficiency TestingBaytown82,543Selenium Blood Test – Deficiency TestingTexarkana79,304Selenium Blood Test – Deficiency TestingPharr78,997Selenium Blood Test – Deficiency TestingFlower Mound75,050Selenium Blood Test – Deficiency TestingCedar Park74,741Selenium Blood Test – Deficiency TestingMissouri City73,682Selenium Blood Test – Deficiency TestingLake Jackson73,478Selenium Blood Test – Deficiency TestingMansfield71,375Selenium Blood Test – Deficiency Testing