In 1959 Ancel and Margaret Keys offered the following—familiar and still useful—precepts regarding nutrition and activity:

Do not get fat; if you are fat, reduce.

Restrict saturated fats: fats in beef, pork, lamb, sausages, margarine and solid shortenings; fats in dairy products.

Prefer vegetable oils to solid fats but keep total fats under 30 percent of your diet calories.

Favor fresh vegetables, fruits and nonfat milk products.

Avoid heavy use of salt and refined sugar.

Good diets do not depend on drugs and fancy preparations.

Get plenty of exercise and outdoor recreation.