Don't eat chicken, duck and fish, don't eat greasy things, don't drink milk, just eat vegetables and fruits. Are those people healthy?
Unhealthy! From the point of view of physiological needs, all foods have their unique values. All kinds of foods contain different nutrients, such as Vc, Vb, oil, protein and so on. Every food is not rich in all nutrients, so it is necessary to eat different foods widely. Not picky about food can keep you healthy, but at the same time, you can't be partial to a certain kind of food!