Chinese medical traditions and current Western research both acknowledge the therapeutic properties of food. Chinese medical theory does not directly separate food from medicine, as both create significant changes in the body. Western research has linked coronary heart disease, diabetes, stroke, and some cancers to improper diet. For good or bad, foods affect all systems of the body. By drawing upon the healing properties of various foods, health problems can be overcome and vitality enhanced. If diet is used for prevention and treatment, other medicines may be required less.