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Nutrition involves the intake and utilization of food substances by our
bodies. Proteins, fats, and carbohydrates (in the form of sugars
and starches) supply us with the calories that we need for energy.
Vitamins, minerals, and dietary fiber supply our bodies with other
important nutrients. In addition to these nutrients, water
is an essential element to a healthy diet.
Vitamins help our bodies perform their metabolic functions. Water-soluble vitamins, including the B vitamins and vitamin C, are excreted quickly, but fat-soluble vitamins, including A, D, E, and K, are stored in the body. Vitamin deficiencies can cause certain diseases, but excessive amounts of fat-soluble vitamins can also lead to health problems. A balanced diet supplies adequate amounts of most vitamins, but certain vitamin supplements may benefit people with specific health or nutrition requirements. Minerals have many uses in our bodies. The functions of iron, calcium, sodium, potassium and magnesium are well-established; the benefits of various trace minerals have also been researched to some degree. Dietary fiber helps us digest food, can lower cholesterol levels, and may help prevent hypertension and some forms of cancer. Many adults drink several glasses of water per day to maintain healthy metabolism and hydration levels, and to help remove body wastes.
Various foods contain different amounts and combinations of nutrients, and a varied diet will generally ensure adequate nutrition. Nutritional supplements may help to compensate for a lack of specific nutrients in a person's diet, but they are no substitute for a healthy diet. The United States Food and Drug Administration and other organizations research nutrition issues and provide nutritional guidelines; these guidelines have been modified and refined over time.
NutritionInformation.us features convenient access to several nutrition information resources, food supplier directories, and nutritional supplement suppliers.
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Nutritional Supplements and Vitamins
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