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A recent Cochrane review article affirmed that finding, based on an analysis of 34 previously published studies on zinc and colds. The authors didn’t find evidence that taking zinc proactively ...
Zinc may help shorten the length and severity of a cold—and some even think it can prevent them. Experts weigh in and dispel any myths.
Zinc gluconate 50 mg tablets (GNC brand) Zinc supplements (frequently zinc acetate or zinc gluconate lozenges) are a group of dietary supplements that are commonly used in an attempt to treat the common cold. [1] Evidence suggests that zinc does not prevent colds but may reduce their duration, with minimal or no impact on symptom severity.
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A systematic review by the Cochrane Collaboration, last updated in 2014, examines twenty-four randomized controlled trials studying various echinacea preparations for prevention and treatment of the common cold. Echinacea showed no benefit over placebo for prevention. [2] Evidence for treatment was inconsistent. Reported side effects were rare. [2]
A 2003 review concluded: "Clinical trial data support the value of zinc in reducing the duration and severity of symptoms of the common cold when administered within 24 hours of the onset of common cold symptoms." [28] Zinc gel in the nose may lead to long-term or permanent loss of smell. The FDA therefore discourages its use.