Herbal medicine , also referred to as Herbalism or Botanical Medicine, is the oldest healthcare known to mankind. Herbal medicine is the utilization of herbs for therapy or medicinal purposes. Derived from plants, herbs are used for their medicine, aroma and spice. Herb plants produce and comprise a mariyad of chemical substances that interact with our bodies. From food, to clothing, to medicine and even shelter; plants have proven invaluable throughout the history of mankind. Through trial and error and based on observations of wildlife, plants have been developed for medicinal use. Over the centuries, mankind has documented the medicinal value of herbs.