


Selenium is an essential trace element that plays a crucial role in human body health. It contributes to protection against oxidative stress, supports the immune system, and performs a function in thyroid gland operation.
Testing selenium levels in the blood can be useful for various reasons. It can help in evaluating nutritional status, identifying deficiencies or surpluses, and contributing to the assessment of certain health conditions related to the thyroid gland, the immune system, and cardiovascular diseases.
The selenium concentration in the blood provides information about a person's selenium status. It helps in assessing whether someone consumes sufficient selenium for optimal health.
A high selenium level can indicate an excess of selenium, which may lead to selenosis. This is a condition that can result in symptoms such as gastrointestinal complaints, hair loss, fatigue, and in severe cases, neurological problems.
A low selenium level can indicate a deficiency, which may contribute to increased vulnerability to oxidative stress, reduced immune function, and possible thyroid dysfunction.
Answers to what people usually want to know.
After ordering we generate a referral letter and email you the instructions. You pick a collection point yourself and book an appointment there. Blood is drawn at the location, processed at the lab, and your result arrives digitally.
Usually very quickly. Collection points typically have slots within a few days, sometimes even same-day. It depends on how busy the location is. For a few specialist analyses we first ship collection materials, which takes a bit longer.
At most collection points yes. Some accept walk-ins. This is clearly indicated per location. You choose the location that works best for you.
Selenium; thyroid and antioxidant enzymes.



€31.95EUR
That depends on the test. Whether fasting is required, and from what time, is clearly stated in the instructions you receive after ordering. No surprises at the counter.
It varies per analysis: from same-day to a few working days. Standard values often come back quickly; analyses that go to an external lab can take a bit longer. You get an email with a link to your digital result, including a short explanation per value.
We work with 1,000+ collection points across the Netherlands. After ordering you'll see which locations near you are available and you pick where you'd like to go.
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