The program they followed is described below.

[Over the past hundred years or so, lifespan has been increasing by roughly one month for every year, or an increase of one year every 12 years.]

This causes you to develop a tolerance to feeling good when eating it, and then feelings of withdrawal when you stop eating it.

"There is some evidence that becoming obese does blunt that reward system, so we do know that overexposure to [foods such as] McDonald's can cause those brain changes."

This causes you to develop a tolerance to feeling good when eating it, and then feelings of withdrawal when you stop eating it.

Lustig notes that this takes about 3 weeks to occur.

"That's why your doctor says, 'Eat less, exercise more,'... the problem is, it can't be done," says Lustig.

"It's not doable. There are reasons, biochemical reasons, why it's not doable that have to do with new hormones that have just been discovered."

In other words, if you are struggling with your weight or interested in your health, avoid these foods.

"When you add sugar to processed food, you kill it, and it's killing us" says Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2). Read the entire article | Email this article

"If you look at the diseases of alcohol, and you look at the diseases of sugar and obesity, they are the same," notes Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2). Read the entire article | Email this article

"Alcohol is metabolized to fat, and so is fructose, driving more liver fat then it can export, you get more insulin resistance, which drives the pancreas to make extra insulin, driving energy deposition into fat cells [increasing body fat], driving your weight gain, and the extra insulin is driving high blood pressure, driving heart disease, driving cell division which leads to cancer, driving changes in the brain that lead to dementia. Driving every single one of these diseases," notes Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2).

"When the pancreas can't make enough insulin, and it burns out, it drives diabetes as well."

"Fructose is a chronic, dose-dependent, liver toxin, which is just like alcohol," notes Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2).

"In fact, fructose, the sweetheart of sugar, is more like alcohol than it is anything else."

"Glucose and fructose are very different, " notes Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2).

He notes that every organism on the planet can absorb and metabolize glucose, but only the liver can metabolize fructose, which, when we consume too much fructose, overloads the liver and causes numerous chronic diseases.

"Sugar is made up of molecules, glucose, which is not very sweet and not very interesting, and fructose, which is very sweet and very interesting. Fructose is the thing that we crave," notes Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2). Read the entire article | Email this article

"When we started putting fat and carbohydrate on the same plate in the 1700's, we became gourmets," notes Robert Lustig, MD, pediatric endocrinoligist from the University of California, San Francisco in a 7-part video series called "The Skinny on Obesity" (Episode 2).

"In the 20th century, when we started putting fat and carbohydrate in the same food, we became 'gourmands'."

"It's when you put fat and carbohydrate together, but they don't work."