It can improve appetite and digestion, because the acetic acid in vinegar can improve the sensitivity of taste buds and stimulate the secretion of digestive juices in the digestive tract, and for people with poor appetite, indigestion, nausea and vomiting, eating vinegar can strengthen the spleen and improve digestion. 2. It can reduce the incidence of intestinal infectious diseases and parasites because aged vinegar is rich in acetic acid, which is good for killing and inhibiting many intestinal pathogenic bacteria and parasites, so eating aged vinegar regularly can reduce the incidence of intestinal infectious diseases and parasites.