The main components of eggshells are calcium carbonate and protein, and a variety of trace elements (zinc, copper, manganese, iron, selenium, etc.), among which the contents of heavy metal elements such as lead and arsenic that are harmful to human body are extremely low, so it is okay to eat them carelessly. Egg shells contain calcium, which can be dissolved with the help of gastric acid digestive juice, and the rest will be discharged with stool.
Egg shell has rich medicinal value, such as egg shell grinding into powder, external application can treat trauma, with anti-inflammatory and analgesic effects. There is a layer of egg membrane on its inner surface. It is also a blind Chinese medicine called Phoenix Clothes, which can be used to treat burns and has the effect of relieving pain. Oral Phoenix Clothes can also protect gastric mucosa.