You can’t eat it. They are blood vessels. Cut the pork kidneys open, clean them, and poke them with boiling water.

1. Pork kidney is sweet, salty and neutral in nature. It can slightly nourish kidney qi, diuresis, and has a mild effect. "It is used in prescriptions and guided by it." (Li Shizhen) It can be used as an auxiliary product for dietary therapy. For treating kidney deficiency and low back pain, "Compendium of Materia Medica" contains this product, pickle it with pepper and salt to remove the fishy water, add 10g of Eucommia powder, wrap it in lotus leaves and simmer it before eating it; to treat kidney deficiency and chronic diarrhea, use this product in "Binhu Collection of Simple Prescriptions" Add Drynaria powder and simmer for cooked food.

2. Pork loin, that is, pig kidney, contains protein, fat, carbohydrates, calcium, phosphorus, iron and vitamins, etc. It has the effects of strengthening the kidneys, nourishing the waist, and regulating kidney qi.