Food, just like air and water is one of the very basic needs of any live organism.
As human beings with free choice, we are responsible for our health and we get to constantly choose the foods which will later become integral parts of who we are.
The Rambam says that most of the diseases known to affect human beings come from bad eating habits. While at his time, certain types of food were to be avoided, the situation then was far from being was it is today.
As the world has been undergoing major industrial and technological changes, so has our food. Refined goods have taken over our markets and working moms with no time have sacrificed the good old cooking habits for the sake of on-the-go microwavable edibles of various kinds.
Combine this with cheap fast food meals which suddenly appeared out of the blue like mushrooms at the end of the rainy day, daily stress and frustrations and you get very high rates of heart attacks every year...
No wonder everyone is constantly complaining about feeling tired and down. Food affects every part of our body as soon as it is ingested, in fact, sugars are broken down as soon as they come in contact with our saliva.
While life expectancy has grown longer, many new diseases affect people already when they hit their mid-forties. More kids suffer from obesity, learning disabilities and various birth defects and if we look carefully we can definitely retrace the root of all those phenomena to the drastic negative changes in what we eat.
The laws of Kashrut mentioned in the Torah have come to teach us how important it is to watch what we eat and control our cravings to preserve our bodies and souls.
We become what we eat.
That's why even though food is just food, it is worth giving it an extra thought...