) is the use of plants for medicinal purposes, and the study of such use. Plants have been the basis for medical treatments through much of human history, and such
is still widely practiced today. Modern medicine recognizes herbalism as a form of
, as the practice of herbalism is not strictly based on
gathered using the
. Modern medicine, does, however, make use of many plant-derived compounds as the basis for evidence-tested
works to apply modern standards of effectiveness testing to herbs and medicines that are derived from natural sources.