The active constituents of plants have only relatively recently been isolated.
The active constituents in plants are the chemicals that have a medicinal effect
on the body. They have been divided into 16 main groups:
These plants can be recognised by their disagreeable, astringent or acrid taste.
The active ingredient stimulates the flow of saliva and gastric juices, thereby
improving appetite and digestive function. Examples are Wormwood and Devil's