This may seem a bit idealistic to some, but here we are talking about the ideals. But even this definition does not cover it all. Let me give an example. There are lots of people around us who catch a cold with every change of season or with every sudden change of temperature. Now in common parlance, we say that these people have low immunity. But the fact is that most of these people have normal blood counts and normal immunological tests. So when these people are not down with cold they are in perfect health as per the above definition. And yet they are not perfectly healthy. Their system breaks down with every stressful condition. So we can add another aspect to the above definition of physical health:
This understanding of the human being is why I like Homeopathy so much. And this is the reason why Homeopathy is so different from every other system of medicine. The dominant medical school still has to realize that just as the parts of a human body can not work in isolation, they also can not fall ill in isolation. There can not be a disturbed liver or a damaged lung unless and until there is a primary disturbance which affects the person as a whole. We can not forget that every part in our body and every cell in those parts has come from a single cell. A cell which had a life force of its own. How can any one dissociate the body parts which have all come from one single cell?
Skip juice cleanses or liquid diets. A popular cleansing regimen for losing weight involves drinking only juice or another type of liquid for a few days to a week. This is dangerous because you could end up without essential nutrients. These extreme cleanses are also counterproductive because most people just gain back any weight they lost when they go back to eating normal food again. Doctors don't recommend any sort of diet like this, and say following a healthy diet and exercise routine is much better for losing weight.