Is it healthy to eat self-heating rice lunch boxes often?

It is unhealthy to eat regularly. The principle of self-heating lunch box is to stew rice and vegetables by using the heat generated by the chemical reaction between iron oxide and water. During this chemical reaction, some harmful gases will be produced, which will be absorbed by rice and stir-fried dishes. Eating this kind of rice will do harm to your health, and it will be half cooked in a short time, which is not conducive to sterilization and unhealthy to eat.