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Midwest · Selenium Blood Test – Deficiency Testing

Selenium Blood Test – Deficiency Testing in Illinois

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 Illinois

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

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

Chicago8,595,181Selenium Blood Test – Deficiency TestingRockford289,763Selenium Blood Test – Deficiency TestingRound Lake Beach287,012Selenium Blood Test – Deficiency TestingPeoria255,718Selenium Blood Test – Deficiency TestingAurora183,447Selenium Blood Test – Deficiency TestingSpringfield162,588Selenium Blood Test – Deficiency TestingChampaign153,278Selenium Blood Test – Deficiency TestingJoliet150,323Selenium Blood Test – Deficiency TestingNaperville149,013Selenium Blood Test – Deficiency TestingBloomington134,357Selenium Blood Test – Deficiency TestingElgin114,156Selenium Blood Test – Deficiency TestingWaukegan89,751Selenium Blood Test – Deficiency TestingDecatur88,002Selenium Blood Test – Deficiency TestingCicero84,905Selenium Blood Test – Deficiency TestingAlton83,705Selenium Blood Test – Deficiency TestingKankakee82,095Selenium Blood Test – Deficiency TestingEvanston78,454Selenium Blood Test – Deficiency TestingSchaumburg78,053Selenium Blood Test – Deficiency TestingArlington Heights77,283Selenium Blood Test – Deficiency TestingBolingbrook73,807Selenium Blood Test – Deficiency TestingPalatine67,754Selenium Blood Test – Deficiency TestingSkokie67,444Selenium Blood Test – Deficiency TestingDeKalb66,624Selenium Blood Test – Deficiency TestingCarbondale66,482Selenium Blood Test – Deficiency TestingDes Plaines60,413Selenium Blood Test – Deficiency TestingOrland Park58,622Selenium Blood Test – Deficiency TestingOak Lawn58,032Selenium Blood Test – Deficiency TestingBerwyn56,960Selenium Blood Test – Deficiency TestingMount Prospect56,510Selenium Blood Test – Deficiency TestingTinley Park55,988Selenium Blood Test – Deficiency TestingOak Park54,100Selenium Blood Test – Deficiency TestingWheaton53,762Selenium Blood Test – Deficiency TestingNormal53,446Selenium Blood Test – Deficiency TestingHoffman Estates52,153Selenium Blood Test – Deficiency TestingDowners Grove50,209Selenium Blood Test – Deficiency TestingGlenview48,150Selenium Blood Test – Deficiency TestingElmhurst45,661Selenium Blood Test – Deficiency TestingLombard44,311Selenium Blood Test – Deficiency TestingPlainfield44,296Selenium Blood Test – Deficiency TestingBuffalo Grove43,062Selenium Blood Test – Deficiency TestingMoline42,660Selenium Blood Test – Deficiency TestingBelleville42,463Selenium Blood Test – Deficiency TestingBartlett41,126Selenium Blood Test – Deficiency TestingRomeoville40,099Selenium Blood Test – Deficiency TestingCrystal Lake40,082Selenium Blood Test – Deficiency TestingCarol Stream39,895Selenium Blood Test – Deficiency TestingStreamwood39,736Selenium Blood Test – Deficiency TestingQuincy39,687Selenium Blood Test – Deficiency TestingPark Ridge39,562Selenium Blood Test – Deficiency TestingUrbana39,189Selenium Blood Test – Deficiency TestingWheeling39,104Selenium Blood Test – Deficiency TestingCarpentersville37,940Selenium Blood Test – Deficiency TestingHanover Park37,545Selenium Blood Test – Deficiency TestingRock Island37,519Selenium Blood Test – Deficiency TestingCalumet City36,065Selenium Blood Test – Deficiency TestingAddison35,999Selenium Blood Test – Deficiency TestingNorthbrook35,108Selenium Blood Test – Deficiency TestingOswego34,324Selenium Blood Test – Deficiency TestingWoodridge34,161Selenium Blood Test – Deficiency TestingGlendale Heights33,443Selenium Blood Test – Deficiency Testing