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Zinc

An essential trace mineral required for immune function, DNA synthesis, wound healing, and optimal hormone production.

Evidence-Based
Fact-Checked
Updated: Aug 26, 2026
Clinical Profile

Quick Reference

Scientific Rating
4.8
/ 5.0
Primary Mechanism
Essential cofactor for over 300 cellular enzymes
Standardized Form
Zinc Picolinate, Zinc Bisglycinate, or Zinc Citrate

Zinc is an essential trace mineral that the human body cannot produce on its own, making regular dietary intake or supplementation necessary to maintain adequate levels. It serves as a cofactor for several hundred enzymes involved in processes ranging from DNA synthesis and cell division to wound healing and taste perception. Zinc's role in immune function is particularly well documented, as it is required for the development and function of neutrophils and natural killer cells, key components of the body's innate immune response. Because zinc absorption can be inhibited by compounds found in whole grains and legumes (phytates), supplemental forms such as zinc picolinate or zinc bisglycinate are often used to improve bioavailability.

Clinical Summary

An essential trace mineral vital for immune system function, testosterone production, and cellular repair. It is particularly noted for reducing the duration of the common cold when administered via lozenges.

Dosage Guidelines

15-30mg elemental zinc daily. Do not exceed 40mg daily long-term without supplementing copper (zinc depletes copper over time).

Safety & Side Effects

Nausea or stomach upset, especially if taken on an empty stomach. Long-term excessive dosing can cause copper deficiency.

Known Interactions

Reduces the absorption of certain antibiotics and penicillamine. Dairy products (calcium) and phytates (grains) can inhibit zinc absorption.

Scientific References

Medical Disclaimer

The information provided in this clinical review is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

*These statements have not been evaluated by the Food and Drug Administration (FDA). This product or ingredient is not intended to diagnose, treat, cure, or prevent any disease.

Always consult your physician or other qualified health provider with any questions you may have regarding a medical condition, or before beginning any new diet, fitness, supplement, or treatment regimen, especially if you have pre-existing medical conditions or are taking prescribed medications.

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