The foods you choose to eat can have a direct impact on your ability to enjoy life to its fullest. Perhaps the most obvious positive effect of food is the pleasurable feeling you get from eating a good-tasting meal. It might be a plate of grilled chicken, corn-on-the-cob, fresh vine-ripened tomatoes, and a baked potato, or a steaming dish of spaghetti topped with a zesty tomato sauce.
Your diet can have long-term effects on your health as well. Diet plays a major role in promoting and maintaining good health, preventing some chronic diseases and treating others, and speeding recovery from injuries. In earlier times, diseases such as goiter and pellagra were relatively common—both are caused by nutritional deficiencies and cured by diets containing sufficient amounts of a particular nutrient. In the case of goiter, iodine is the missing nutrient; with pellagra it is mainly niacin, a B vitamin. These diseases are rare today in the United States because most Americans get enough of these essential nutrients in their diets.
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