Certain researchers have published peer-reviewed reports that the use of zinc lozenges reduces the length and severity of cold symptoms. Why are some scientists still skeptical about the merits of using zinc lozenges during a cold?
A) Most people get zinc in their diet so extra zinc lozenges may not affect a cold.
B) Ideas about vitamin C have been discredited, so zinc will also be ineffective.
C) There is no way of knowing if the original work was properly controlled.
D) There may be other reasons why the people taking zinc lozenges recovered faster.

Question

Quizplus · Accepted Answer

Some scientists may remain skeptical because there could be other factors affecting the recovery of the individuals taking zinc lozenges, and more research is needed to determine the true effectiveness of zinc lozenges. Additionally, the original studies may not have been properly controlled, leading to biased or unreliable results.

Certain Researchers Have Published Peer-Reviewed Reports That the Use of Zinc