High-quality Dendrobium nobile has the functions of immunomodulation and delaying aging. It is suitable for people with low immune function such as excessive smoking, drinking, nightlife, fatigue, diabetes, tumor, cardiovascular disease and stomach liver disease. It can obviously improve human immune function, promote gastric juice secretion, enhance gastric emptying ability and help digestion; Taking Dendrobium candidum in moderation for a long time can strengthen the body and improve the body's resistance to various diseases. Therefore, the biggest feature of Dendrobium nobile is that it is a good immunomodulator. Dendrobium is a good health food and medicinal material, which is deeply loved by people.