A blood test to measure zinc levels is called a zinc serum or plasma test. This test assesses your zinc level, a crucial element for immune function, wound healing, skin health, and overall metabolism.
Understanding the Zinc Blood Test
Several methods exist to measure zinc levels, primarily focusing on blood components:
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Plasma or Serum Zinc: This is the most common method. A blood sample is drawn, and the zinc concentration in the serum (liquid portion after clotting) or plasma (liquid portion before clotting) is measured. The normal range varies slightly depending on the laboratory, but typically falls between 60-120 µg/dL (micrograms per deciliter) or 0.60-1.20 mcg/mL (micrograms per milliliter) for children aged 10 and younger and 0.66-1.10 mcg/mL for older individuals. [Reference: Verywell Health, ScienceDirect Topics, LabCorp]
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Whole Blood Zinc: While less common than plasma or serum tests, whole blood zinc levels can also be assessed. [Reference: ScienceDirect Topics]
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Other Methods: Other bodily fluids such as erythrocytes (red blood cells), neutrophils (a type of white blood cell), lymphocytes (another type of white blood cell), and even hair can be tested for zinc content. However, these are less frequently used and may not be as reliable. [Reference: PubMed]
It's important to note that a blood test may not be entirely reliable for diagnosing mild zinc deficiencies. [Reference: Healthdirect] Other tests, such as the zinc protoporphyrin (ZPP) test, are primarily used for assessing lead exposure and iron deficiency. [Reference: Testing.com]
When is a Zinc Blood Test Ordered?
Your doctor might order a zinc blood test if they suspect a zinc deficiency based on your symptoms or medical history. A deficiency can manifest in various ways, including skin problems, hair loss, impaired immune function, and delayed wound healing.
