Longan is commonly known as "cinnamon", is China's southern subtropical valuable specialty, the history of the southern "cinnamon" north "ginseng" said. Longan fruit is rich in nutrients, since ancient times by the people, more as a precious tonic, its tonic function is obvious.

Ming Li Shizhen had "resource benefits to longan for good" evaluation. According to the analysis, the pulp contains whole sugar 12.38-22.55%, reducing sugar 3.85-10.16%, 0.096-0.109% of the whole acid, vitamin C 43.12-163.7 mg / 100 grams of flesh, VK196.5 mg / 100 grams of flesh. In addition to fresh food, longan can also be processed and dried, canned, decocted and so on. Longan has a strong yang and gas, tonic heart and spleen, nourish the blood and tranquilize the spirit, emollient beauty and other efficacy, can treat anemia, palpitations, insomnia, forgetfulness, neurasthenia, and after the disease, post-partum weakness and so on. Modern medical practice has proved that it also has the effect of beauty, longevity.

Longan contains sugar, protein and a variety of vitamins and other nutrients, especially the sugar content is very high, and can be directly absorbed by the body of glucose to, weak anemia, old age, chronic illness, often eat some longan is very complementary; women's post-partum, longan is also an important tonic food.

So, the elderly can eat longan can play a strong yang and gas, tonic heart and spleen, blood and tranquility, moisturizing beauty and other effects, can treat anemia, palpitations, insomnia, forgetfulness, neurasthenia and post-disease, postpartum weakness and other diseases, have the effect of prolonging life.