The exact number of oysters, also known as oysters, to be consumed at one time is judged mainly by the size of the oyster. Typically, 40-75 grams of oyster meat is appropriate for consumption. When converted into oysters, medium to large size oysters can be consumed about 1-2, and smaller ones can be consumed 3-4. Oysters are rich in taurine, vitamins, and trace elements such as selenium, zinc, and iron, which help to replenish the body with the required nutrients. Moreover, oysters are a high-protein food with low fat and cholesterol content, which is suitable for people with cardiovascular diseases. However, if consumed in excess, it can also increase the metabolic burden of the body, thus inducing some adverse reactions. For example, raw oysters contain purines, which can aggravate the condition for patients with hyperuricemia and gout. Moreover, oysters are a kind of seafood, and for people who are allergic to seafood or have poor gastrointestinal function, eating large amounts of them may cause gastrointestinal inflammation, which may cause food poisoning in serious cases, so it is recommended to eat them in moderation. It is recommended to choose fresh, vibrant oysters when selecting oysters and avoid oysters that have been dead for a long time. It is not recommended to eat oysters that have been dead for a long time because the bacteria that live in oysters begin to decompose the proteins in the oysters after they die, which can produce substances that are harmful to human health. And when eating oysters, you need to cook them before eating them to avoid the bacteria and parasites still alive, which may cause gastrointestinal discomfort, abdominal pain, diarrhea and other uncomfortable symptoms.