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Midwest · Selenium Blood Test – Deficiency Testing

Selenium Blood Test – Deficiency Testing in Missouri

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 Missouri

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

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

St. Louis2,092,481Selenium Blood Test – Deficiency TestingKansas City1,644,497Selenium Blood Test – Deficiency TestingSpringfield298,722Selenium Blood Test – Deficiency TestingColumbia136,736Selenium Blood Test – Deficiency TestingIndependence122,230Selenium Blood Test – Deficiency TestingLee's Summit100,772Selenium Blood Test – Deficiency TestingO'Fallon90,802Selenium Blood Test – Deficiency TestingJoplin81,025Selenium Blood Test – Deficiency TestingSt. Joseph80,099Selenium Blood Test – Deficiency TestingSt. Charles70,218Selenium Blood Test – Deficiency TestingBlue Springs58,265Selenium Blood Test – Deficiency TestingSt. Peters57,289Selenium Blood Test – Deficiency TestingFlorissant52,382Selenium Blood Test – Deficiency TestingChesterfield49,675Selenium Blood Test – Deficiency TestingWentzville43,213Selenium Blood Test – Deficiency TestingJefferson City43,076Selenium Blood Test – Deficiency TestingCape Girardeau39,415Selenium Blood Test – Deficiency TestingWildwood35,384Selenium Blood Test – Deficiency TestingOakville35,357Selenium Blood Test – Deficiency TestingUniversity City34,953Selenium Blood Test – Deficiency TestingBallwin30,998Selenium Blood Test – Deficiency TestingLiberty30,129Selenium Blood Test – Deficiency TestingRaytown29,893Selenium Blood Test – Deficiency TestingKirkwood29,233Selenium Blood Test – Deficiency TestingMehlville28,672Selenium Blood Test – Deficiency TestingMaryland Heights28,141Selenium Blood Test – Deficiency TestingGladstone26,825Selenium Blood Test – Deficiency TestingGrandview25,931Selenium Blood Test – Deficiency TestingHazelwood25,466Selenium Blood Test – Deficiency TestingBelton23,832Selenium Blood Test – Deficiency TestingWebster Groves23,817Selenium Blood Test – Deficiency TestingNixa22,925Selenium Blood Test – Deficiency TestingRaymore22,722Selenium Blood Test – Deficiency TestingSedalia21,696Selenium Blood Test – Deficiency TestingOzark20,874Selenium Blood Test – Deficiency TestingArnold20,808Selenium Blood Test – Deficiency TestingOld Jamestown20,382Selenium Blood Test – Deficiency TestingRolla19,949Selenium Blood Test – Deficiency TestingWarrensburg19,509Selenium Blood Test – Deficiency TestingAffton18,925Selenium Blood Test – Deficiency TestingFerguson18,826Selenium Blood Test – Deficiency TestingConcord18,760Selenium Blood Test – Deficiency TestingCreve Coeur18,648Selenium Blood Test – Deficiency TestingRepublic18,313Selenium Blood Test – Deficiency TestingManchester18,308Selenium Blood Test – Deficiency TestingFarmington17,959Selenium Blood Test – Deficiency TestingSpanish Lake17,721Selenium Blood Test – Deficiency TestingKirksville17,600Selenium Blood Test – Deficiency TestingHannibal17,165Selenium Blood Test – Deficiency TestingClayton16,905Selenium Blood Test – Deficiency TestingLake St. Louis16,665Selenium Blood Test – Deficiency TestingPoplar Bluff16,318Selenium Blood Test – Deficiency TestingLemay16,312Selenium Blood Test – Deficiency TestingSikeston16,054Selenium Blood Test – Deficiency TestingOverland15,908Selenium Blood Test – Deficiency TestingFort Leonard Wood15,629Selenium Blood Test – Deficiency TestingGrain Valley15,435Selenium Blood Test – Deficiency TestingCarthage15,395Selenium Blood Test – Deficiency TestingJackson15,272Selenium Blood Test – Deficiency TestingLebanon14,880Selenium Blood Test – Deficiency Testing