Chinese nutrition therapy is one of the five branches of Traditional Chinese Medicine (TCM) and is the study of food as therapeutic agents for the preservation of health and the treatment and prevention of disease. For over 2000 years, doctors in China evaluated and recorded the properties of foods and their effects on the body.
Food is considered to have the same energetic actions as herbs (cooling, warming etc) for treating disease and its application is based on similar principles but with a much broader range of applications. Food energetics refers to the effects food has on the digestion, physiological processes and metabolism of the body.
Chinese nutrition therapy follows the same diagnostic and treatment principles as acupuncture and Chinese herbal medicine. Chinese nutrition therapy can be thought of as food used as medicine. You can learn more detailed information here