The Centers for Disease Control and Prevention (CDC) reports that 69% of Americans over age 20 years are overweight or obese, which is defined as being 20% over the desirable weight for one's gender, height, and body build. Inadequate calorie intake, or undernutrition, is also becoming more common. In some cases, this is the result of poverty; however, in many cases, it is a result of self-imposed dieting
