Duck kidney, that is, the yellow skin on the inner wall of duck gizzard (duck gizzard), should be torn off when cleaning. Generally, duck gizzards are taken out immediately after killing ducks, and the inner wall is peeled off immediately, washed and dried, or the yellow skin of the inner wall is peeled off when cleaning before cooking, without waiting for cooking.

Duck gizzard is duck's stomach, duck's muscular stomach, flat and round in shape, dense in meat, tough and chewy, long in taste, without greasy feeling. They are delicious food and treasures for all ages. The stomach of birds is divided into glandular stomach and muscular stomach. The glandular stomach wall is thin, and the parietal cells secrete gastric acid and various digestive enzymes for soaking and digesting food; Muscle stomach has developed muscle wall, the inner wall is covered with a hard horny membrane, and the inner cavity contains some small sand grains, which act like teeth and are used to grind food.

The inner wall of dried chicken inner gold is disc-shaped, such as chicken inner gold film, with dark green or purple-black surface and slight wrinkles. Loose horny parts. The smell is fishy and slightly bitter.

This product is used equally with Endothelium Corneum Gigeriae Galli from Sichuan, Yunnan and Hunan.

Function indication-the effect of duck gizzard coat can cure all bones, choke diaphragm and regulate stomach. Spleen and stomach, promote digestion. Used for dyspepsia, vomiting, diarrhea and infantile malnutrition.

Oral administration and dosage: grind powder, 0.5 ~ 1 yuan.

The chemical composition mainly contains protein, about 70%, with high pepsin.