Medicinal Chinese herbs have been used for
  centuries to treat diseases and alleviate discomfort
  due to a variety of different disorders. Over 90
  percent of Chinese herbs are derived from plants, 
  including the roots, stems, leaves, flowers, fruits,
  barks or peels. Many traditional Chinese herbs
  can be obtained in the form of tablets and capsules
  versus the bulk variety which was used in the past
  for home brewing.