1. Middle-aged and elderly people. Dendrobium nobile can improve the SOD level of the body and scavenge oxygen free radicals, thus having antioxidant effect and delaying aging, so it is suitable for middle-aged and elderly people to eat. Zhu Danxi, a famous doctor in the Yuan Dynasty, said: "After forty, Yin Qi is half", which means that after people enter middle age, Yin Qi tends to be weak and decays quickly, so we should pay attention to timely supplement. 2. People with yin deficiency constitution. People with yin deficiency tend to be emaciated, usually feel dry mouth, red tongue and rapid pulse, eat spicy food or stay up late and get angry easily, and often have symptoms such as sore throat, red tongue and sore tongue coating. Symptoms of yin deficiency are more common after serious illness, serious illness or long illness. Exhaustion of body fluids, persistent low fever, fever of hands and feet, hot flashes in the afternoon, emaciation, night sweats, dry mouth and throat, short and red urine, red tongue and weak pulse. 3. All kinds of heat and dryness. Dendrobium candidum is sweet, slightly bitter and slightly cold, and can nourish yin and clear heat. It can be used for various dryness-heat diseases caused by various reasons, such as lung heat and lung dryness, stomach heat and stomach dryness, and various dryness-heat diseases of respiratory system, digestive system, endocrine system and urinary system. For example, for patients with stomachache and retching caused by stomach heat, Dendrobium officinale is combined with bamboo shavings, reed roots and loquat leaves to nourish yin, clear stomach and stop vomiting. To treat lung dryness and cough, Dendrobium officinale, Trichosanthes root and loquat leaves are used to nourish yin and moisten the lungs, and phlegm and cough are eliminated. (1), chronic pharyngolaryngitis is an obvious manifestation of dryness and heat, mainly manifested as dry throat, which belongs to yin deficiency and internal heat according to syndrome differentiation. (2) Diabetes is also a common dry and hot disease, which is caused by excessive lung and stomach fire and yin deficiency and body fluid injury. Dendrobium can nourish yin, promote fluid production, quench thirst, clear lung and stomach deficiency and heat, so it can be said that Dendrobium is the choice of diabetic patients. Clinical practice has proved that Dendrobium can significantly improve the symptoms of diabetes patients such as dry mouth, constipation and fatigue, and has a good effect on abnormal glucose demand. (3) palpitation and insomnia is mostly caused by deficiency of heart yin and excess of heart fire. Dendrobium is cold, sweet, nourishing yin and promoting fluid production, and can be used to treat palpitation and insomnia. Cough, especially persistent cough, is mostly dry and hot. (4) Among all kinds of stomach diseases, there are not a few dry-heat types. Clinically, Dendrobium has achieved good results in treating stomach diseases, and most of them belong to those with stomach fire due to yin deficiency. (5) Sjogren's syndrome, mostly due to yin deficiency and internal heat in TCM, is characterized by dry mouth, dry eyes and dry skin; Dendrobium has the function of nourishing yin and promoting fluid production, and has a good therapeutic effect on this disease. 4. Various eye diseases. Dendrobium has good eyesight improving effect, which is beneficial to eye health care and prevention and treatment of various eye diseases. Most patients with early cataract have poor eyesight and blurred vision, which are mostly caused by yin deficiency of liver and kidney, inflammation of deficiency fire and loss of eye support. Dendrobium can nourish yin, moisten dryness, nourish liver and improve eyesight, and is often combined with Chinese wolfberry, chrysanthemum, cassia seed and other drugs to achieve the prevention and treatment effect. 5. Cancer patients. Pharmacological experiments have proved that Dendrobium candidum has the effect of inhibiting tumors. Dendrobium has been widely used in clinic to treat various malignant tumors together with other righting drugs. For example, Dendrobium Mixture combined with Astragalus membranaceus and Hirudo is effective in the treatment of advanced esophageal cancer. The decoction of nourishing yin and benefiting qi composed of Dendrobium combined with Radix Panacis Quinquefolii, Radix Rehmanniae, Radix Scrophulariae, Radix Ophiopogonis, Cornus officinalis and Lily can improve the postoperative survival rate of laryngeal cancer. After radiotherapy and chemotherapy, tumor patients usually have symptoms of yin deficiency and body fluid failure. Taking Dendrobium to supplement deficiency can reduce the side effects of radiotherapy and chemotherapy. Dendrobium with Radix Astragali, Rhizoma Atractylodis Macrocephalae, Radix Pseudostellariae, Fructus Lycii, Caulis Spatholobi, etc. And has synergistic effect on tumor radiotherapy. If you buy fresh Dendrobium, choose round stems, turquoise or yellow-green ones, which are sticky to chew and have less dregs. It can be taken in a variety of ways, such as chewing, making tea, frying soup, and putting it into an old duck pot for medicated diet. It is worth noting that many Dendrobium stems can be processed into maple buckets, such as copper maple buckets and purple maple buckets. Tin maple bucket and some similar processing maple buckets are also difficult to identify from the appearance, but the prices are far apart.