The Chinese herbal tradition has been mastered over thousands of years.  It is regarded as a most sacred and dependable healing method.  Herb formulas are individualized to treat the symptoms, disease, and the underlying patterns of each patient.  The majority of herbal medicine consists of plant parts.  Some other Chinese "herbs" may include minerals, shells, fungi, animal products, or resins.  endangered species of plants and animals are protected and are not used in the U.S.  Herbs are most effective when taken consistently over a period of time since their effect is usually cumulative.  The west also has a rich herbal tradition.  Sometimes local plants and remedies are best used.  Herbs, in general, are considered low in toxicity when prescribed by a trained herbalist.