Pig kidney is pig kidney. Pig kidney is named "silver ingot box" because it looks like ancient silver ingot. Pig kidney is soft, shiny, elastic and reddish, and contains nutrients such as zinc, iron, copper, phosphorus, vitamin A, vitamin B, vitamin C, protein, fat and carbohydrates.

Buy:

First of all, when choosing pig kidney, we should look at its color: fresh pig kidney is soft, shiny, elastic and reddish; The stale pig kidney is blue in color, white after soaking, soft in texture, inelastic in expansion and stinking. Secondly, see if there are blood spots on its surface. If there is, it is not normal. Finally, pay attention to see if it is thicker than the average pig kidney. If it is thick and big, it is necessary to carefully observe whether it belongs to a pig kidney with red and swollen kidneys. The examination method is: cut the pig kidney with a knife to see if the medulla (between the red tissue and the white tendon) and cortex are blurred. If it is, it is not normal. Don't buy it.