The reason why he may be harmful to health is that we can't completely guarantee that the temporary food we eat every time is within the safe range, which is a situation and fact beyond our control. Although there is nothing wrong with the food itself on the surface, it has actually been damaged, and the possibility of food deterioration in the near future is higher than that of normal food, which is an unchangeable fact. So when we eat temporary food, the risk will be higher.
Second, but if the temporary food you eat is within the shelf life and has not deteriorated, even temporary food will not cause any harm to your health.
Temporary food is actually food within the shelf life. Under normal circumstances, there will be no problem. Unless there is a deviation in the process of transportation or storage, such as a box of frozen milk staying in a room at room temperature for a period of time during transportation, although it is still within the shelf life, it may still deteriorate. However, the possibility of his deterioration is not because of the impending period, but because of improper preservation, so the impending food itself will not endanger health.
In essence, eating temporary food has no harm to the body. What is harmful is the spoiled food and the food itself. We should make a judgment according to the situation.
We can't rule out that some foods we eat and spoiled foods are harmful to our health, such as junk food or spoiled milk. Junk food itself is harmful to our health, so even if it becomes temporary food, it will still harm our health. Deteriorated food is a factor beyond our control. After all, we can't judge whether food has really gone bad by its surface.