Zinc is one of the only ingredients linked to shortening a
cold. Unlike Vitamin C, which studies have found likely does
nothing to prevent or treat the common cold, zinc may actually
be worth it. The mineral seems to interfere with the replication
of rhinoviruses, the bugs that cause the common cold.
In a 2011 review of
studies of people who were recently sick, researchers looked at
those who started taking zinc and compared them with those who
took a placebo. The ones on the zinc had shorter colds and less
severe symptoms.
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