Collagen in pig's trotters can also promote the growth of hair and nails, keep the skin soft and delicate, and often eat pig's trotters, and the nails will shine. It can also effectively prevent progressive dystrophy, have certain curative effect on gastrointestinal bleeding and hemorrhagic shock, and improve systemic microcirculation, thus preventing or alleviating coronary heart disease and ischemic encephalopathy. For the elderly after operation and recovering from serious illness, it is beneficial to the recovery of normal physiological functions of tissues and cells, accelerate metabolism and delay the aging of the body.