A healthy and balanced diet is essential for maintaining the health of your body. Eating too much of any one type of food can disrupt the natural balance of nutrients in your body and negatively impact your overall health. It is important to eat a wide variety of foods to make sure you get all of the vitamins, minerals and other nutrients you need.
Carbohydrates, Fats and Proteins
One reason why you should get a varied diet is to make sure you get carbohydrates, fats and proteins in the right proportions. According to the Mayo Clinic, you should get between 45 and 65 percent of your calories each day from carbohydrates. Fats should make up less than 30 percent of your calories, and saturated fat should make up no more than 7 percent of your caloric intake. Finally, protein should provide between 10 and 35 percent of your calories each day.
Vitamins and Minerals
Eating a varied diet helps to ensure that you get enough vitamins and minerals, the Centers for Disease Control and Prevention reports. Vitamins support the function of enzymes, which in turn play a role in chemical reactions used for virtually every process in your body. You also need minerals to make new tissues and to regulate your muscles and nerves. Different foods have different amounts of these important substances, so it is critical to get a wide variety of foods to avoid vitamin or mineral deficiencies.
Fiber
Another critical part of the diet is fiber. Fiber is a type of carbohydrate which cannot be absorbed by your digestive tract, so it passes through your intestines. Insoluble fiber, which does not dissolve in water, adds bulk to your stool and can help prevent constipation. Soluble fiber, on the other hand, forms a gel when it is exposed to water, and can help lower your blood glucose and cholesterol levels. Fruits, vegetables, whole grains, nuts, beans and legumes are good sources of fiber.
Essential Fatty and Amino Acids
You also need a variety of foods to get all of the essential fatty acids and amino acids that your body needs to make new proteins and structures. These substances are termed "essential" because your body cannot synthesize them on its own, which means you must get them from your diet. Essential fatty acids are the omega-3 and omega-6 fatty acids found in some fish and vegetable oils, the Linus Pauling Institute explains. You can get the essential amino acids from eating meat, soy protein and by eating different kinds of vegetable protein, MedLinePLus notes.
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