More than 2-3 hours.

According to the query on Gourmet World: Laohuo soup usually refers to the long cooking time. It usually needs to be boiled and then continued to cook for a period of time, usually more than 2-3 hours. Laohuo soup is characterized by sufficient heat, rich flavor, sweetness and rich nutrition. However, the longer the soup is cooked, the better. Cooking soup for a long time will cause the purine and fat content in the soup to be too high, which may cause high blood pressure, gout and other diseases. Therefore, it is recommended that when making soup, the soup making time should be controlled according to the characteristics of the ingredients and medicinal materials, and should not be too long or too short. Generally speaking, the meat soup should be simmered for about 1 hour, and the longest should not exceed 2 hours; the fish soup should be simmered within 1 hour.

In addition, if you want to reduce the purine content in the soup, you can add some raw materials that can remove and inhibit nitrite when making the soup, such as green onions, onions, etc.; After soup, eat some fruits rich in vitamin C, such as oranges, kiwis, etc.