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Everyone hopes to have a good health, but not everyone understand the importance of nutritional foods to our health. Appropriate nutrition is a necessary condition to maintain a good health. In our daily life, the main source of nutrition comes from variety of foods we eat. Health starts with nutritional foods. It is the intention of this article to help you to have appropriate nutritional foods by introducing some basic knowledge of the relationships between nutrition and health, and nutrients foods. Nutrients are necessary for human bodies to maintain energy to move, and generate chemical substances such as enzymes for metabolic activities. The nutrients that are essential to human bodies may be categorized into three types. The first category includes carbohydrates, fats, and proteins. They are the primary source of energy. Carbohydrates are the principal dietary source of energy. Fats supply energy and essential fatty acids, and they help absorb the fat-soluble vitamins. However, some kinds of fat, especially saturated fats, increase the risk for coronary heart disease by raising the blood cholesterol. ¡° Proteins are polymers of amino acids that are needed for synthesis of body proteins in muscle, organs, bone and skin, and for synthesis of enzymes, certain hormones, antibodies and a host of specialized products¡± (¡°Human amino acid requirements: can the controversy be resolved¡±217).
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