Obesity is the condition of being considerably overweight, and refers to a person with a body mass index (BMI) of 30 or more pounds over his or ideal recommended weight and height. Approximately 34% of Americans are obese. This is roughly 72 million Americans.

Overweight describes a person who has a BMI of 25 to 29.9, or who is between 25 to 30 pounds over his or her ideal weight and height. At present, 66% of Americans older than age 20 are overweight.