Longan contains nutrients such as sugar, protein and various vitamins. Fresh longan is rich in vitamin C, which can enhance the toughness of capillaries, and has antioxidant and anti-aging effects.

After fresh longan is dried, the contents of protein, carbohydrates and minerals will be obviously increased, especially the iron content will be increased, which can promote the regeneration of hemoglobin while improving heat energy and supplementing nutrition, thus achieving the effects of enriching blood and resisting cold. The carbohydrates mainly exist in the form of glucose and sucrose, so it tastes sweet. In addition, longan also contains a variety of amino acids, choline, tartaric acid and other substances, which is the source of its powerful nourishing ability. Disadvantages: people who fall in love with fire are not suitable for eating.

Longan with nourishing function is suitable for people who are weak after delivery or illness, and people who need blood can also eat longan in moderation. Because longan is easy to get angry when eaten, it is not suitable for people with weak fire. In addition, people suffering from wind-cold, indigestion and pregnant women should also eat carefully.