Zinc Supplementation Reduces Common Cold Duration among Healthy Adults: A Systematic Review of Randomized Controlled Trials with Micronutrients Supplementation.

Am J Trop Med Hyg · 2020 · PMC7356429 · PMID 32342851

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did not reach statistical significanceno p-value reported

However, the reduction in cold duration did not reach statistical significance (95% CI: −0.48, 0.20), and heterogeneity was not significant between pooled studies ( I 2 = 0%, P > 0.05) ( Figure 3 ).

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