The biggest difference between black-bone chicken and ordinary chicken is the melanin in it. Black-bone chicken contains lysine, methionine and histidine, which are indispensable to human body, and has high medicinal value, especially melanin, which has the functions of nourishing yin and tonifying kidney, nourishing blood and replenishing essence, benefiting liver and clearing heat, and tonifying deficiency. It can regulate human immune function and resist aging. Enjoy the reputation of "medicine chicken" since childhood. It has a good curative effect on irregular menstruation, uterus deficiency and cold, menstrual abdominal pain, metrorrhagia and leukorrhagia, and emaciation caused by postpartum physical weakness, milk deficiency and qi and blood deficiency. Black-bone chicken has a good nourishing effect on all debilitating diseases of the elderly.