The explanation of litchi slave in Ling Lu Biao Yi in Tang Dynasty is that "litchi has just finished and the dragon looks familiar, so southerners call it litchi slave."
Longan has long been used for health care and treatment of diseases in ancient China. It is considered as a nourishing medicine, which has the effects of nourishing qi and blood and calming the nerves. It can treat insomnia, forgetfulness, fright, physical weakness, postpartum edema and so on.
Longan meat can be eaten alone or made into longan paste. For example, the "Yuling Plaster" described by Wang Shixiong, a doctor in the Qing Dynasty, is a traditional Chinese medicine made by steaming longan meat with white sugar (the dosage is about110), which is said to have the effect of "invigorating qi and blood and overcoming kidney qi".
Taking it with boiling water can treat patients with deficiency of both qi and blood, which is considered to be very suitable for parturient to take before delivery. Longan can also be combined with other drugs to form various therapeutic prescriptions, such as Guipi Decoction, which was strictly used by doctors in the Song Dynasty and recorded in Jisheng Prescription. It has the effects of strengthening the spleen, nourishing the heart, benefiting qi and enriching blood, and is still a commonly used prescription for health care.
In addition, longan meat and other foods can be made into a variety of foods, such as eight-treasure rice and eight-treasure porridge, which are well-known desserts, while longan lotus seed soup, longan jujube soup and longan red bean soup can also be used for dietotherapy.
Modern scientific experiments show that longan meat is rich in glucose, riboflavin, potassium, magnesium, phosphorus, especially selenium. It also contains more sucrose, tartaric acid, nicotinic acid, choline, protein and dietary fiber. It is reported that longan meat probably contains substances that delay aging.
Therefore, eating longan meat in moderation in daily life is good for your health. However, Chinese medicine believes that people with indigestion, thick and greasy tongue coating, sore throat, toothache and yin deficiency and internal heat should not eat longan for the time being. ?