Medicinal compounds found within a plant are the specific ingredients that make it useful even to modern day medicine. These compounds have been proven to have no significant role in the metabolism of the plant itself.  These compounds have also been termed secondary plant products that possibly assume the task of isolating waste matter within the plant that has accumulated from metabolic processes, but does not go along with the design of the plants for their growth and efficiency. 

Glycosides are among these compounds found in plants some of which are digitoxins found in foxglove as used in heart medication and salicin from willows which is present in aspirin as mentioned above.  Another natural medicinal compound found in plants are, alkaloids such as quinine, codeine, morphine, nicotine and caffeine; when used in small doses only these are beneficial, but using too much could be harmful, even deadly.  Tannins from the plant are also used in tanning and dyeing woods or leathers and have been found to be an astringent aiding in the shrinking of blood vessels.  Nearly all of our essential vitamins needed are present in plants, along with the mineral elements we as humans and animals require to survive and maintain a healthy life.  Also, some of the oils from the plant contain antimicrobial properties that help to kill germs, cure infections and break fevers.  Oils are also used for purposes including aromatherapy which involves using plants and herbs to deal with one’s sense of smell. In essence, there are innumerous benefits that can be gained from plants and herbs as used for medicine and health purposes, that seem to be present for our uses.