Selenium Serum Test
- Category
- Toxic Elements
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 9 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
Measures selenium in your blood.
Why this test is performed?
Selenium levels help detect deficiency (thyroid and heart effects) or toxicity from excess supplements.
Who should take this test?
Suspected exposure to metals at work, from water, cosmetics or traditional medicines, or unexplained nerve/kidney symptoms.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
- Report time: In 9 days
- No fasting
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Frequently asked questions
Avoid seafood for 2–3 days before metal testing (it can raise arsenic and mercury), and tell the lab about supplements or traditional medicines.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 7–8 days after the sample reaches the lab. You will receive the report online.
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