Chocolate, whether opened or not, is not recommended to be eaten once it has passed its shelf life. Many people may think that if the chocolate is unopened, it is not exposed to air and the surface does not look bad, so it can continue to be eaten after the expiration date, but in fact, there is already a possibility of chocolate deterioration. Because the chocolate contains vegetable fats, refined fats, unopened chocolate will occur after the expiration of the oil rancidity, which will increase the peroxide value, resulting in the oxidation of oil exceeds the standard. After consuming food with excessive fat oxidation, it may lead to food poisoning, causing indigestion, diarrhea, vomiting and other symptoms of gastrointestinal discomfort, and may damage the liver. Therefore, before consuming unopened chocolate, you should look in advance to see if it is within the shelf life to avoid health hazards after accidental consumption. If you have already eaten expired chocolate, and the consumption is not very large, it is recommended to observe whether the body appears abnormal, once there is an abnormal reaction is recommended to seek medical attention as soon as possible. Chocolate that has been opened should be wrapped in plastic wrap and put in the refrigerator to avoid contact with the air to avoid deterioration caused by bacteria. Unopened chocolates can be stored directly in the refrigerator to avoid melting due to high room temperature, which affects the taste of chocolate. If the outdoor temperature is not high, you can put the chocolate in a cool and ventilated place to avoid direct sunlight.