Half a day to two days. The public health network found that food testing usually takes half a day to two days to produce results, which usually depends on the testing method. Food inspection includes self-inspection, entrusted inspection and comparison inspection. If it is a self-inspection, it is generally to observe the color of the food and see if there is any abnormality in the taste of the food. It usually takes half a day to get the test results. Entrusted inspection is usually food that cannot be produced by itself, and it needs to be entrusted to a third party for inspection, or it can be obtained in two days.