Loss of appetite means loss of appetite. There are several reasons for loss of appetite, seasonal factors being one of them, with more patients suffering from indigestion in summer. Foods with a sour taste are generally appetizing. The daily diet should include foods that are easy to digest, such as porridge and pasta. If children have digestive problems, they need to take certain vitamins and trace elements, such as zinc and calcium, accordingly. Adults eat more seasonal vegetables, melons and fruits, in addition, they can consume a small amount of vinegar to promote digestion.