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South · Selenium Blood Test – Deficiency Testing

Selenium Blood Test – Deficiency Testing in Tennessee

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 Tennessee

Here is what you need before ordering and completing the Selenium Blood Test – Deficiency Testing in TN. 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 Tennessee communities

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

Nashville1,098,486Selenium Blood Test – Deficiency TestingMemphis1,034,498Selenium Blood Test – Deficiency TestingKnoxville619,925Selenium Blood Test – Deficiency TestingChattanooga403,233Selenium Blood Test – Deficiency TestingClarksville198,689Selenium Blood Test – Deficiency TestingMurfreesboro181,450Selenium Blood Test – Deficiency TestingJohnson City131,902Selenium Blood Test – Deficiency TestingKingsport98,767Selenium Blood Test – Deficiency TestingFranklin81,531Selenium Blood Test – Deficiency TestingCleveland72,589Selenium Blood Test – Deficiency TestingJackson71,983Selenium Blood Test – Deficiency TestingBristol69,734Selenium Blood Test – Deficiency TestingHendersonville60,628Selenium Blood Test – Deficiency TestingBartlett57,639Selenium Blood Test – Deficiency TestingSmyrna52,401Selenium Blood Test – Deficiency TestingCollierville50,669Selenium Blood Test – Deficiency TestingSpring Hill48,403Selenium Blood Test – Deficiency TestingBrentwood44,354Selenium Blood Test – Deficiency TestingGallatin43,306Selenium Blood Test – Deficiency TestingColumbia40,957Selenium Blood Test – Deficiency TestingGermantown40,955Selenium Blood Test – Deficiency TestingLa Vergne38,127Selenium Blood Test – Deficiency TestingMount Juliet38,059Selenium Blood Test – Deficiency TestingLebanon37,471Selenium Blood Test – Deficiency TestingCookeville34,068Selenium Blood Test – Deficiency TestingMaryville31,281Selenium Blood Test – Deficiency TestingOak Ridge31,087Selenium Blood Test – Deficiency TestingMorristown30,387Selenium Blood Test – Deficiency TestingFarragut23,388Selenium Blood Test – Deficiency TestingShelbyville23,005Selenium Blood Test – Deficiency TestingEast Ridge21,967Selenium Blood Test – Deficiency TestingTullahoma20,599Selenium Blood Test – Deficiency TestingSpringfield18,561Selenium Blood Test – Deficiency TestingSevierville18,038Selenium Blood Test – Deficiency TestingGoodlettsville17,522Selenium Blood Test – Deficiency TestingDyersburg16,235Selenium Blood Test – Deficiency TestingDickson15,855Selenium Blood Test – Deficiency TestingSeymour15,633Selenium Blood Test – Deficiency TestingGreeneville15,361Selenium Blood Test – Deficiency TestingArlington14,158Selenium Blood Test – Deficiency TestingElizabethton14,112Selenium Blood Test – Deficiency TestingAthens13,961Selenium Blood Test – Deficiency TestingPowell13,855Selenium Blood Test – Deficiency TestingMcMinnville13,699Selenium Blood Test – Deficiency TestingLakeland13,693Selenium Blood Test – Deficiency TestingNolensville13,393Selenium Blood Test – Deficiency TestingSoddy-Daisy13,090Selenium Blood Test – Deficiency TestingPortland13,031Selenium Blood Test – Deficiency TestingWhite House12,820Selenium Blood Test – Deficiency TestingLewisburg12,131Selenium Blood Test – Deficiency TestingManchester11,956Selenium Blood Test – Deficiency TestingCrossville11,892Selenium Blood Test – Deficiency TestingRed Bank11,855Selenium Blood Test – Deficiency TestingMiddle Valley11,569Selenium Blood Test – Deficiency TestingHartsville11,463Selenium Blood Test – Deficiency TestingLawrenceburg11,460Selenium Blood Test – Deficiency TestingUnion City11,119Selenium Blood Test – Deficiency TestingCollegedale10,973Selenium Blood Test – Deficiency TestingAlcoa10,777Selenium Blood Test – Deficiency TestingMillington10,583Selenium Blood Test – Deficiency Testing