Immune System Support
Zinc enhances immune function by aiding T-cell production and activation, potentially reducing the duration and severity of colds when taken early.
Wound Healing
Zinc promotes skin repair and collagen synthesis, accelerating wound healing and recovery from injuries or surgeries.
Protein Synthesis and Growth
Zinc is vital for protein synthesis, DNA formation, and cell division, supporting growth and development, particularly in children and pregnant women.
Antioxidant Properties
Zinc acts as an antioxidant, protecting cells from oxidative stress and reducing inflammation, which may lower chronic disease risk.
Hormonal Health
Zinc supports testosterone production and reproductive health in men and women, potentially improving fertility.
Skin Health
Zinc helps manage acne by regulating oil production and reducing inflammation, often used in topical treatments.
Cognitive Function
Zinc supports brain health, aiding memory, learning, and mood regulation through neurotransmitter function.
Taste and Smell
Zinc is essential for maintaining proper taste and smell senses by supporting related enzyme functions.
Immune System Support
Zinc enhances immune function by regulating T-cell development and activation, interacting with immune signaling pathways, and inhibiting viral replication, such as in rhinoviruses, by stabilizing cell membranes and blocking viral entry.
Wound Healing
Zinc promotes wound healing by supporting collagen synthesis and fibroblast proliferation, acting as a cofactor for enzymes like matrix metalloproteinases that facilitate tissue remodeling and repair.
Protein Synthesis and Growth
Zinc facilitates protein synthesis and growth by serving as a cofactor for over 300 enzymes, including those involved in DNA and RNA synthesis, stabilizing protein structures, and enabling cell division through zinc-finger protein interactions.
Antioxidant Properties
Zinc reduces oxidative stress by inducing metallothionein production, which scavenges free radicals, and by inhibiting NADPH oxidase, an enzyme that generates reactive oxygen species, thus protecting cells from damage.
Hormonal Health
Zinc regulates hormonal health by acting as a cofactor for enzymes in steroidogenesis, supporting testosterone synthesis, and modulating gonadotropin-releasing hormone activity to influence reproductive function.
Skin Health
Zinc controls skin health by regulating sebum production through inhibition of 5-alpha-reductase and reducing inflammation via suppression of pro-inflammatory cytokines like IL-6, aiding in acne management.
Cognitive Function
Zinc supports cognitive function by modulating NMDA and GABA receptors in the brain, facilitating synaptic plasticity, and maintaining neuronal signaling critical for memory, learning, and mood regulation.
Taste and Smell
Zinc enables taste and smell by acting as a cofactor for gustin (carbonic anhydrase VI), an enzyme essential for taste bud function and olfactory receptor signaling, ensuring sensory acuity.
Study: Randomized, double-blind, placebo-controlled trial (NCT03171961) in zinc-deficient children with asthma exacerbations. Children received zinc bis-glycinate (15 mg twice daily) or placebo for 7 days or until hospital discharge.
Findings: Zinc reduced asthma exacerbation severity within 24–48 hours, suggesting benefits in zinc-deficient children with respiratory infections.
Link: ClinicalTrials.gov - NCT03171961
Study: Randomized, double-blind, placebo-controlled trial (NCT05212480) with 470 COVID-19 patients (231 received oral zinc 25 mg twice daily, 239 received placebo) for 15 days.
Findings: Zinc reduced 30-day mortality (6.5% vs. 9.2%, OR: 0.68, 95% CI 0.34–1.35) and ICU admissions (5.2% vs. 11.3%, OR: 0.43, 95% CI 0.21–0.87). It shortened symptom duration in outpatients by 1.9 days (95% CI 0.62–2.6). No severe adverse events were reported.
Link: ClinicalTrials.gov - NCT05212480
Findings: No significant reduction in symptom duration (5.9 days for zinc vs. 6.7 days for standard care, P = 0.45). Gastrointestinal side effects were higher in the zinc group (18.5%). The trial was stopped early for futility.
Link: ClinicalTrials.gov - NCT04342728
Zinc Supplementation in HIV-Infected Adults With Low Plasma Zinc Levels
Randomized, controlled trial (NCT00149552) in 231 HIV-infected adults with low plasma zinc (<0.75 mg/L) receiving zinc (12 mg/day women, 15 mg/day men) or placebo for 18 months.
231 HIV-infected adults with low zinc. 18-month intervention.
Zinc supplementation significantly delayed immunological failure (CD4+ count <200 cells/mm³) and reduced diarrhea incidence. Supports zinc as adjunct therapy in zinc-deficient HIV patients.