How does stale food affect health?

It doesn't affect your health.

it depends on what food you are eating and how much.

Nutrology. The subject of nutrition is Nutritionism and someone that studies it is a Nutritionist.

Although improvements have been made through public awareness, the prevalence of fats, especially saturated fats, can make fast food unhealthy to consume regularly. High fat diets have been...

What you eat affects your physical health because it directly contributes to weight, cholesterol, and digestion among other things. And those things are all linked to other aspects of your health as...