Purine mainly exists in the nucleus. When the ingredients are stewed at high temperature, the nucleus will rupture and purine will be released into the soup, so the purine content in the soup will be higher.

Waterproof stewing soup is a cooking technique that the raw materials of stewing soup are put into a container, then the container is put into a pot filled with water and heated with warm fire for a long time, and the raw materials in the container are cooked by heating the water in the pot. Waterproof stew is generally based on beef, mutton, pork and other meats. Under the premise of the same stew, waterproof stew contains the same amount of purine as normal direct stew.

Matters needing attention in soup making

1, avoid adding cold water in the middle, because the heated meat shrinks when it is cold, so the protein is not easy to dissolve, and the soup loses its original flavor.

2. Don't put salt too early, because putting salt too early will solidify the protein in the meat and make it difficult to dissolve, thus making the soup darker, with insufficient concentration and unsightly appearance.

3. Avoid adding too many seasonings such as onion, ginger and cooking wine, so as not to affect the original flavor of the soup itself.

4. Avoid putting too much soy sauce too early, so as not to sour the soup and darken the color.

5. Don't let the soup boil, so as not to make the soup turbid due to the violent movement of protein molecules in the meat.