Some published, peer-reviewed research reported that using zinc lozenges reduced the length and severity of cold symptoms. why might some scientists still be skeptical about using zinc lozenges to treat a cold?

Because many different things can reduce the length and severity of cold symptoms, this action may not be related to the use of zinc tablets.

Explanation:

Although research using zinc tablets has been reviewed and published, there is no 100% certainty that zinc tablets are influential in decreasing the length and severity of cold symptoms. This is because many different factors can achieve this same result, such as stress or relaxation events, eating, differences in the immune system, sleep quality, among other things. Because of the vast number of factors that can influence the length and severity of symptoms, some scientists may still be skeptical about using zinc lozenges to treat a cold.

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explanation:

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