Researchers are conducting a study to determine the effects of the mineral zinc on the human body. The study involves providing pills that contain zinc to one group of human subjects and pills that do not contain zinc or other active ingredients to another group of people. The pills that do not contain zinc are

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The pills that do not contain zinc are placebos. Placebos are inactive substances that are given to a control group in a study to compare the effects of the active treatment group. This helps to determine whether the effects observed in the treatment group are due to the active ingredient or to other factors such as the placebo effect or natural variations in the body.

Researchers Are Conducting a Study to Determine the Effects of the Mineral