Zinc

Optimal Result: 9 - 22 Units.

Zinc: Essential Functions and Clinical Insights

Zinc is critical for the growth and development of all living organisms due to its involvement in numerous enzymatic and regulatory processes, protein folding, and receptor binding. As a cofactor for over 300 enzymes, zinc plays a central role in various biological functions.

Symptoms and Causes of Zinc Deficiency

Symptoms of Zinc Deficiency:

  • Mild Deficiency: Depressed growth, altered cognition, poor carbohydrate metabolism, weakened immune function, alopecia, and skin or eye lesions.
  • Severe Deficiency: Teratogenesis, diarrhea, impotence, and impaired wound healing.

Common Causes of Zinc Deficiency:

  • Maldigestion and malabsorption
  • Chelation therapy
  • Low dietary zinc intake
  • Extensive diuretic use
  • Metallothionein dysfunction
  • High alcohol consumption
  • Surgery or burns

Zinc is vital for normal wound healing, skin health, and immune function. It also helps prevent cadmium toxicity.

Assessing Zinc Status

Currently, there is no universally accepted standard for measuring zinc status. Optimal assessment often involves a combination of tests, as individual measurements (e.g., whole blood, plasma, erythrocytes, or urine) may not fully capture total-body zinc status.

Erythrocyte Zinc Levels:

  • Erythrocytes, with their 110–120 day lifespan, reflect long-term zinc stores.
  • Low erythrocyte zinc is a marker of depletion and is associated with conditions like cystic fibrosis.
  • High erythrocyte zinc has been observed in cancer metastasis, hypertension, and renal failure.

Urinary Zinc Levels:

  • Low Levels: Indicate zinc deficiency.
  • High Levels: Linked to muscle protein catabolism from starvation or trauma.
  • Studies suggest a renal mechanism for zinc regulation, with urinary zinc decreasing in deficiency and increasing in excess.
  • Elevated urinary zinc, but not copper, has been observed in kidney stone formers.

Hair Zinc Levels

Hair zinc is a marker of nutritional zinc status, though its interpretation can be complex:

  • Low Hair Zinc: May indicate zinc deficiency, particularly in children.
  • High Hair Zinc: Seen in specific conditions like pregnancy, where elevated hair zinc paradoxically reflects systemic depletion.

External Factors Affecting Hair Zinc:

  • Chemical treatments (e.g., bleaches, dyes, perms) can lower hair zinc.
  • Certain denture adhesives, shampoos, and ointments containing zinc may artificially elevate hair zinc levels.

Key Considerations

  • Zinc supports enzymes like carbonic anhydrase, highlighting its importance in erythrocyte function.
  • Nutritional deficiency is often linked to low hair or urinary zinc, while high values in specific tissues may reflect compensatory mechanisms during depletion.
  • Assessing zinc status requires a holistic approach, combining measurements from multiple biological matrices to understand systemic levels.

What does it mean if your Zinc result is too high?

High Hair Zinc: Seen in specific conditions like pregnancy, where elevated hair zinc paradoxically reflects systemic depletion.

Frequently asked questions

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Yes, you can. When entering values for the biomarker, you will see an "Edit Range" button. Click this button, and you'll have the option to enter a custom range.

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