According to the current research evidence, the air fryer is harmless to the body. Air fryers use fast circulating hot air to ripen food. It generates hot air through the heat pipe in the high-temperature heating machine, and then blows the high-temperature air into the pot with a fan, so that the high-temperature air circulates in the closed space to heat the food, and the food is cooked by using the grease of the ingredients themselves. Therefore, the air fryer will not cause harm to the body when working. In the process of processing ingredients, the temperature of air fryer is often 180℃, and food will lose its own nutrients if it is placed in high temperature environment for a long time. Therefore, from the nutritional point of view, it is recommended to use air fryer as little as possible.