Question

why are we suggested not to take too cool or hot food material

Answer 1

Too hot food would increase the temperature of ur body n as a result there will be an increased activity of acid in ur stomach which will result in production of high amount of heat in ur body n u'll start sweating. N n it will also result in acidity.

now if u take cold food then that would result in decrease in the body temperature. now the temperature has reduced then the stomach will have to 1st bring the food to the normal body temperature n then it must start it's digestion process. this may also result in freezing ur stomach lining for some time.

Answer 2

we are suggested not to take too hot food becuz it can burn our hands.
we are suggested not to take too cool food becuz becteria reacts with the food and spoil them