Recent videos claiming that a school in Ganzhou, Jiangxi, serves pre-made meals to its students have sparked heated discussions across the country. People doubt if pre-made meals, despite being convenient, are healthy and nutritious enough for growing teenagers.
Pre-made meals refer to half-finished or finished dishes that are already cooked or prepared, according to the China Cuisine Association. There are several types of pre-made foods, including ready-to-eat food, such as canned （罐装的） food or cooked food in packages, and ready-to-heat or ready-to-cook food, which requires heating or cooking before being served.
Many people tend to think that ready-to-heat and ready-to-cook foods are less nutritious because they usually need to be kept in freezers or refrigerators.
"Actually freezing does not cause a loss of nutrients," Liu Junya, a 33-year-olddietitian in Beijing, told Teens. "Nutrient loss typically occurs during the heating or frying process."
Vitamins from the B group and vitamin C found in meat and vegetables are heat-sensitive and can be lost during the process. By being heated or cooked twice or more, "pre-made foods can be less nutritious than freshly prepared and cooked foods," Liu said.
Meanwhile, "many pre-made food companies prioritize taste over nutrition," said Liu. This leads to higher levels of salt and sugar in the food, which may lead to health problems, such as high blood pressure or diabetes （糖尿病） in the long term.
Additives （添加剂） are also a major concern related to pre-made food. In China, there are strict standards for food additives. Currently, China's food industry has well-developed techniques to preserve pre-made food without the excessive use of additives. Some food can be sterilized （消毒） and then sealed （密封） after cooking, followed by low-temperature storage, allowing for a longer shelf life. However, it's essential that customers buy pre-made meals from qualified food companies or supermarkets.
It is hoped that regulations on pre-made meals can be strengthened to better ensure nutrition and hygiene（卫生）. This way, "pre-made meals will be more accepted by the public," Liu said.
