It is safe to say that the majority of people understand that what they eat has some effect upon their health. Nearly anyone can observe that after eating too much junk food, they tend to have an upset stomach, or that after they eat a large meal, they feel tired. Many people in the United States believe that a bowl of chicken soup can help alleviate the common cold, and that "an apple a day will keep the doctor away." In China, herbs have long been used to treat various maladies. …
