Dietary taboos of dried persimmons. Because dried persimmons contain a large amount of sugar, including sucrose, glucose and fructose, diabetic patients cannot eat high-sugar foods, so they cannot eat them. Dried persimmons contain tannic acid, which can combine with iron in food to hinder the body's absorption of iron ions. People with anemia symptoms should eat less persimmons. It is not advisable to eat persimmons on an empty stomach or when tired, and vegetables containing more fiber cannot be eaten at the same time.