Biomarker Reference · Zn
Zinc (Blood) (Zn) is a clinical biomarker used in heavy-metals-toxicology assessment. Zinc is an essential trace element serving as a cofactor for more than 300 enzymes and playing structural roles in zinc-finger transcription factors. It is measured in 3 laboratory tests on BiomarkersLabs.com.
Zinc is an essential trace element serving as a cofactor for more than 300 enzymes and playing structural roles in zinc-finger transcription factors. It is critical for immune function, wound healing, protein synthesis, and DNA synthesis. Zinc homeostasis is tightly regulated, and serum zinc is influenced by acute-phase responses (falls during inflammation and infection), fasting state, and diurnal variation.
Blood zinc is ordered to diagnose deficiency (acrodermatitis enteropathica, malabsorption, prolonged parenteral nutrition, chronic diarrhoea) and to monitor repletion. Deficiency impairs immune function, delays wound healing, and causes taste disturbance and dermatitis. Excess zinc, often from supplementation, causes copper deficiency by competitive inhibition of intestinal absorption.
Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.
3 tests on BiomarkersLabs.com include this biomarker.
Zinc (Blood) reference range in this test: 70–120 µg/dL (serum/plasma); whole-blood values higher but less commonly used.
Zinc (Blood) reference range in this test: ZRT laboratory-specific; approximately 75–120 µg/dL, method-dependent.
Zinc (Blood) reference range in this test: Serum zinc approximately 60–120 µg/dL, age- and sex-dependent; fasting specimen preferred.
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