They do not even think of what they eat, and if it can effect their health or not. That is a bad way that most people do because our health depends on what we eat daily. Foods are the building blocks of every cell in the body, are responsible for the proper functioning of the whole body. It is important, for that reason, to know what is good for our body and what is not. Foods can be classified into two types, unhealthy (junk) and healthy food