A
    Healthy food is a general term (术语) applied to all kinds of food that is considered healthier than the types of food sold in supermarkets. For example, whole grains, dried beans, and corn oil are health food. A narrower classification (分类) of healthy food is natural food. This term is used to distinguish (区分) between types of the same food. Raw honey is a natural sweetener, while refined (提炼的) sugar is not. Fresh fruit is a natural food, but canned fruit, with sugars and other additives (添加剂), is not. The most exact term of all and the narrowest classification within health food that has been grown on a particular kind of farm. Fruits and vegetable that are grown in gardens, that are treated only with organic fertilizers, that are not sprayed with poisonous insecticides (杀虫剂), and that are not refined after harvest, are organic food. Meat, fish, dairy and poultry products from animals that are fed only on organically-grown food and that are not injected with hormones (激素) are organic food.
    In choosing the type of food you eat, then, you have basically two choices: inorganic, processed (加工) food, or organic, unprocessed food. A wise decision should include study of the reason why processed food contains chemicals, some of which are proved to be poisonous and that vitamin content is greatly reduced in processed food.