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

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The pills that do not contain vitamin D are placebos. A placebo is a substance or treatment that has no therapeutic effect, used as a control in clinical trials to test the efficacy of another substance or treatment. In this study, the group receiving the placebo pills will serve as a control group to compare the effects of the vitamin D pills on the other group.

Researchers Are Conducting a Study to Determine the Effects of Vitamin