Choose one of the tonic herbs (discussed on page #60 of your textbook) used in traditional Chinese medicine and answer the following questions? 
1. Is this herb used in the United States? What are the health benefits of this herb?
2. Is there any research study done on this herb? Mention the research study and discuss results of it. 
Guidelines: The answer should be based on the knowledge obtained from reading the textbook, no just your opinion. Is there are 4 questions in the discussion, you must answer all of them. 
Grading Criteria: Student mentions if this herb is used in US (20 points). Health benefits (30 points). Mention research study (20 points). Discuss results of research study (30 points).