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Nutritional disorders include the mental and physical roles that contribute to the insufficient or excess intake of nutrients by the body.
Nutritional deficiencies, particularly common in Third World countries, constitute common examples of environmental influences on health. These can result in a variety of associated metabolic disorders. On the other hand, nutritional deficiencies in the First World are more commonly a result of psychological eating disorders.
On the other end of the spectrum, excessive eating can also lead to a wide variety of diseases. Several studies have shown a strong correlation between obesity and diabetes, cardiovascular disorders, and other complications. Obesity has become a high profile problem in the United States with about 40% of the population now considered obese. Some governments have even considered compensating for gastric bypass surgery as a preventive measure from even higher health care costs due to future health problems.
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