Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,929 questions · 15,174 findings · 2,372 reviews

No studies found 15,174 · 100%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

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Zinc vs placebo

Risk of serious adverse events, including those that may be complications of the common cold · adults and children with colds and/or upper respiratory infections

The review found no eligible studies for this question.

1 finding from 1 review