The main health care function of longan: longan can nourish yin and tonify kidney, tonify middle warmer and qi, moisten lung, stimulate appetite and tonify spleen, and can be used to treat weakness after illness, anemia, chlorosis, neurasthenia and postpartum blood deficiency. Scientists at home and abroad have found that longan pulp has obvious anti-aging and anti-cancer effects. Studies have shown that there is a flavoprotein (MAO-B) in human body, which is closely related to the aging of the body, that is, the increase of its activity can accelerate the aging. Osaka Institute of Traditional Chinese Medicine in Japan has conducted anti-cancer experiments on more than 800 kinds of natural foods and drugs, and found that the aqueous extract of longan meat has an inhibition rate of more than 90% on cervical cancer cells, which is 25% higher than that of the control group's anti-cancer chemotherapy drug bleomycin, and it is almost equivalent to the anti-cancer drug Changshouxin alkali. At the second anti-aging scientific research conference in China, some scholars suggested that longan may become a potential anti-aging food with MAO-B inhibitory activity, and confirmed that Shennong Herbal Classic said that longan has the effect of being young and not getting old.