Selenium, Blood

Quest Diagnostics

Sample type: Whole blood

Requires fasting: No

Phlebotomy required

Details

Selenium (Se) is a key component of a number of functional selenoproteins required for normal health. The best known of these are the antioxidant glutathione peroxidase enzymes, which remove hydrogen and damaging lipid and phospholipid hydroperoxides generated in vivo by free radicals and other oxygen-derived species. If not removed, lipid hydroperoxides impair membrane structure and function and cause blood-clotting disturbances by decreasing the production of prostacyclin while increasing the production of thromboxane.

Biomarker summary

Selenium, Blood

Additional details

Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected

Selenium, Blood
Selenium is crucial for our body, playing a major role in our health. It's part of important proteins called selenoproteins, which include powerful antioxidants that protect our cells. These antioxidants help get rid of harmful substances produced by our body, which can damage cell membranes and lead to blood clotting issues. By keeping these harmful substances in check, selenium supports overall health and prevents damage.

What patients is this test right for?

This test might be recommended if there's a concern about selenium levels, which are vital for antioxidant protection and overall health.

What type of sample is required for this test?

2 mL whole blood collected in an EDTA trace metal-free (royal blue-top) tube

Test Resources

For more information, consult your healthcare provider or visit reputable health websites for guidance on selenium's role and its importance in your diet and health.

Average sample processing time

4–5 business days

Reference range

<20 years Not Established
20-50 years 115-240 mcg/L
>50 years 100-250 mcg/L

Health categories

Patient instructions

Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:

Quest Diagnostics Patient Service Centers (PSC)

Location: Visit a nearby Quest Diagnostics Patient Service Center.
Cost: $10 sample collection fee (paid during lab order checkout).
Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
Collection Instructions:

Bring a valid ID.
Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.

Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
More Info: Quest Diagnostics blood draw guide

Getlabs Mobile Phlebotomy

Location: Sample collection at your home or office.
Cost: $85 sample collection fee (paid during lab order checkout).
Availability: Available in most locations – enter your ZIP code during checkout to confirm.
Scheduling: Schedule your appointment here through your Fullscript account.
Collection Instructions:

Have your digital or printed requisition form and valid ID ready.
Your phlebotomist will contact you by phone to coordinate arrival.

More Info: Getlabs blood draw guide

In-office phlebotomy instructions

Specimen

Preferred Specimen(s): 2 mL whole blood collected in an EDTA trace metal-free (royal blue-top) tube
Alternative: NA
Minimum Volume: 1 mL
Collection Instructions: NA

Storage and shipping instructions