Session Alignment

Many doctors believe that obesity is one of the greatest threats to good health .

Overweight people often have shorter lives and are also more apt to contract such diseases as diabetes , high blood pressure , heart disease , and various disorders of the digestive system .

In the late 1980 s , scientists discovered strong evidence that there is a genetic basis for obesity—that is , that children of obese parents will probably become obese themselves .

Nevertheless , it is still true that a person 's weight is directly related to the amount of food eaten and the level of energy expended .

All foods are fattening if eaten to excess .

In reducing , the maximum safe body weight loss is about two pounds per week .