UCSF researcher and nationally renowned obesity expert Dr. Robert Lustig has theorized that the obesity epidemic is caused by a "poisoned" food supply that is actually altering the population's biochemistry.
The processed foods most readily available to Americans are causing them to eat more and move less. He has based his hypothesis on results culled from thousands of obesity studies.
Insulin and Leptin
Processed foods are loaded with sugars that make your body believe that it is hungry; this, in turn, drives people to consume more calories and conserve energy. Sugar causes the body to produce more insulin, which then blocks leptin, a hormone that normally tells the body when it is appropriate to stop eating.
A Grassroots EffortTwo-thirds of American adults are overweight, and one-third are obese, according to the federal Centers for Disease Control and Prevention. If Dr. Lustig's ideas are correct, breaking the pattern of sugar consumption may take a grassroots effort of doctors, community leaders and consumers to force the government and the food industry to get sugary foods out of the mainstream American diet.