In fact, researchers have looked at some of the reasons why people have that belief. What they found is that a person's preference for natural things involves a range of ideas, including the belief that nature is pure and inherently superior to humans. Researchers have also found that these beliefs, or biases, affect the decisions people make about their health.

Nature has been good to us. Nature gave us aspirin and morphine, and other medicines derived from plants. The use of plants as medicines has a long history in the treatment of disease, and plants have played an important role in improving our health.