For example, if you have a fight tomorrow, and you wake up with a major stomachache or a toothache or a headache, your performance is not going to be the same. A healthy diet is priceless. I believe there are no diseases, only sick people. What happens is a body becomes weakened at its weakest part. It's like a rope breaking at its weakest point.
Some people never have headaches, but they have continuous stomachaches.
Other people eat a lot of junk and never have stomachaches, but always have headaches. I don't gain weight. But they suffer from something else. It affects people differently. The concept is to combine foods so that when they are chemically mixed inside the body, they do not become acidic.