Does Zinc Supplementation work?

The current Migaku evidence database contains 2 reusable source documents for Zinc Supplementation. This answer focuses on strength of evidence and what the studies can or cannot prove. - Zinc supplementation in liver cirrhosis: meta-analysis of its effect on biochemical and clinical outcomes. [Gong Y (2026); evidence level 1] - Zinc-deficient elderly participants received zinc aspartate supplementation for approximately 7 days, resulting in increased serum zinc levels, IFN-γ production, and a trend toward increased ZIP8 expression; in participants taking PPIs, this increase reached statistical significance. [Olah K (2026); evidence level 4] - Although we found no clear correlation between ZIP8 expression and zinc status, the observed response to supplementation warrants further investigation. [Olah K (2026); evidence level 4] - Aging impacts immunity, zinc status, and overall health, with these factors being closely interconnected. [Olah K (2026); evidence level 4] - Zinc is known to modulate protein expression and cytokine production, with new molecular mechanisms continuing to be identified. [Olah K (2026); evidence level 4] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.