Obesity is a condition of excess fatness that results from an imbalance between energy consumed and energy expended. When the body takes in more food that it uses up, the extra is stored as fat deposits, resulting in overweight. Obesity subjects to shift in perceptions though, both on the part of health experts and the general public. Dr. Xavier Pi-Sunyer, one of the nation’s leading experts on obesity points out:

A population cannot be precisely divided into normal and obese…. In the

modern world, with the great intermixing of ethnic and racial groups, wide

genetic heterogeneity exists. The heterogeneity is manifested by differing

heights, body circumference, and heaviness of frame. It is undesirable

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