why can't we heat food jar another time after heathing it once?

It is not recommended to heat baby's food jar again after heating it once because of the health issues that might appears. Once opened and heated once, the food inside the baby jars might loose of its quality and germes can appear. In addition to this, each time that the food is heated it looses some of its vitamines.

It is then recomended to take from the jar only the amount of food that is going to be eaten and to keep the rest in the refrigerator for one or two days depending on the product.