MINISTRY OF FOOD THE WEEK'S FOOD FACTS No.7 EVERYONE knows that we must eat for energy, and for building or rebuilding our bodies. But do you know that we can eat also to protect ourselves from illness? Science has discovered that some foods rich in vitamins and mineral salts increase resistance to infections. All the foods in the panel below are of this kind: they are pro- tective foods. They are nature's "tonics" and nature's "medicines". They should be part of your diet as much as the body-building and energy foods.