Oysters are rich in protein. Cooking time is too short, protein will not be completely denatured, which is not conducive to the human body's absorption of protein. However, if the cooking time is too long, the degree of degeneration of protein will be too strong, which is not conducive to the human body's absorption of protein. Therefore, it is more appropriate to steam oysters with shells for 7-8 minutes and oysters without shells for 3-5 minutes. The way to judge whether oysters are steamed is to see whether the fishy smell of oysters is reduced and whether the color of oyster meat is reduced. At this time, in order to ensure food safety and good absorption of nutrients to a greater extent, oysters should be cooked for 7-8 minutes with shell and 3-5 minutes without shell.

It is suggested that patients with skin diseases and spleen and stomach deficiency and cold should not eat oysters. Oysters are cold foods, which can cause stomach pains and other symptoms.