Cold Time is Cut in Half According to Study

A study showing that Zinc lozenges can cut the duration of cold symptoms in half was published in the August 2000 issue of the Annals of Internal Medicine.

The randomized, double-blind, placebo study, conducted at the Detroit Medical Center in Michigan and published in Annals of Internal Medicine, tested lozenges containing 12.8 mg of zinc against a placebo. 25 cold sufferers were treated with the zinc lozenges, 23 received placebo lozenges. The results were:

  • The zinc group had a shorter average duration of cold symptoms. Average for the zinc group was 4.5 days - the placebo group's colds lasted 8.1 days on average.
  • Duration of coughs was reduced from 6.3 days for the placebo group to 3.1 days for those using zinc lozenges.
  • Duration of nasal discharge was 5.8 days for the placebo group, 4.1 days for those using zinc.
  • Severity of all of these symptoms was reduced for those using zinc lozenges.

"Administration of zinc lozenges was associated with reduced duration and severity of cold symptoms, especially cough," state the authors of the study headed by A.S. Prasad of Wayne State University.

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