Zinc is an essential trace element critical for immune function, particularly for regulating T‑helper cells and stabilizing mast cells, which are key players in allergic responses. Zinc deficiency can impair immune balance and may promote allergic inflammation by increasing histamine release and shifting cytokine profiles toward a pro‑allergic Th2 response. Observational studies have linked low zinc status with higher IgE levels and increased risk of allergic conditions such as hay fever, asthma, and atopic dermatitis. However, the evidence is largely mechanistic and observational; high‑quality randomized controlled trials examining zinc supplementation for allergy prevention or treatment are scarce and show inconsistent results. Therefore, a general recommendation to take zinc for allergies is not supported by strong clinical evidence. Maintaining adequate zinc intake through diet (e.g., meat, nuts, legumes) is prudent, but supplementation should be reserved for confirmed deficiency. The relationship between zinc and allergies is nuanced, influenced by gut microbiota, inflammation, and genetics. In summary, zinc supports immune regulation, but its direct role in allergy management remains unclear and requires further research.
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