[stefaan]

Doctor Mayr said:
Nutrition = Food x Digestion

Food:
"Don't buy anything you're grandmother wouldn't recognize as food."
(In the US it's difficult I hear; a Belgian cook opened a resto in the US, and had to fly over almost everything, because you couldn't find it locally...)
Never eat to much at once.
Cooking food is not so bad as mentioned above, but you should learn to cook properly, so the enzymes don't get destroyed in the process.
...

Digestion:
It most often is already going the wrong way at the start.
People don't take the time to eat. If you take time to eat, you'll eat less. People don't chew enough. Normally you should chew at least over 20 times per bite. Most of us chew 5-6 times and swallow. It's also a bad idea to drink while eating (and it's better to wait a while after you have eaten). It's a bad idea to cover your food with lot's of gravy, saus, juice. When you have to learn to chew more, make it a habit, then it's a good idea to stick to dry food for a while. They oblige you to chew properly. If you chew properly you will eat less.
If you manage to make all things better, that happen in your mouth, you will relieve you estomach of a heavy burden. The digestion will be better as a whole. It's a good idea to take a rest for a while after you have eaten. It's a bad idea to immediately start a heavy duty job of some kind.
...