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Beaumont Laboratory

Zinc Level



  • This test may be useful as an indicator of acute deficiency. For acute toxicity, Urine Zinc may be a more reliable indicator of exposure.
  • Diet, medication, and nutritional supplements may introduce interfering substances. Upon the advice of their physician, patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and nonessential over-the-counter medications for one week prior to specimen collection.

Specimen Collection Criteria

Collect (preferred specimen): One Royal Blue-top tube with no additives.
Also acceptable: One Royal Blue-top EDTA tube.

Physician Office/Drawsite Specimen Preparation

Centrifuge to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma into a plastic transport tube and maintain at refrigerated (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 2.0 mL serum or plasma, refrigerated (2-8°C or 36-46°F). (Min: 0.7 mL)

Rejection Criteria

  • Hemolyzed specimens.
  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 24 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 14 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.


Sent to Warde Medical Laboratory, Ann Arbor, MI.


Tuesday, Friday.
Results available in 4-7 days.

Reference Range

60-130 mcg/dL.

Test Methodology

Atomic Absorption.


Elevated results from noncertified trace element-free tubes may be due to contamination. Elevated concentrations of trace elements in serum should be confirmed with a second specimen collected in a trace element-free tube, such as royal blue sterile tube (no additives).

Clinical Utility

  • Dietary zinc deficiencies can lead to various clinical symptoms depending on the degree of the deficiency. Mild deficiencies can result in oligospermia, weight loss, hyperammonemia, and lowered ethanol tolerance. Moderate zinc deficiencies can lead to childhood growth retardation, hypogonadism, dermatitis, poor appetite, delayed wound healing, lethargy, and impaired immune responsiveness. In patients with severe deficiency, dermatitis, alopecia, weight loss, diarrhea, neuropsychiatric disorders, recurrent infection, and death may result.
  • Zinc deficiency can also result from malabsorption, hepatic cirrhosis, hepatitis, protein-losing nephropathies, and from exudate loss (e.g., severe burns). Medications (e.g., anabolic steroids, metal-chelating agents) can also interfere with zinc metabolism. Pregnancy is associated with high fetal utilization of maternal zinc levels.

CPT Code


Test Codes


Last Updated


Microtainer® and Vacutainer® are registered trademarks of Becton, Dickinson and Company.
UroVysion® is a registered trademark of Abbott Laboratories. ThinPrep® is a registered trademark of Hologic, Incorporated.

This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.