Nutrition Eastern Medicine theory suggests that diet has a direct and profound influence on the health and well being of an individual. The principles were developed over 2000 years ago and are still relevant to today’s patient. When the digestive system is not working correctly we see more imbalances in a person’s health. In Eastern medicine we diagnose individual conditions in terms of deficiency, excess, obstruction, outside sources and the influences on yin, yang, qi, blood as well as what channel is being affected for why the condition may exist. Examples of dietary influences on diagnosis can include: Not eating leads to general deficiency of Qi and blood; Overeating obstructs.