I guess it's like Texas, everything is bigger when you're obese. The extra $1,500 is 41% more than an average-weight person spends each year.

In total, the yearly cost of obesity in the United States is $147 billion, or 9% of all medical expenses. And, it figures to get worse now that the average American is 23 pounds overweight.

The higher price tag extends to all areas of medical spending, including prescription drugs and Medicare.

According to research published in the journal Health Affairs, the average American dishes out $3,400 on medical expenditures every year, but that number jumps to $4,870 if the person is obese.

And Medicare takes a major hit. The cost of obesity is 72% higher for prescription drugs. An obese person can expect to pay $1,400 more on medications than a normal-weight individual.

Experts cite the over-consumption of soda for the boom in obesity. They believe a soda tax will help cut the consumption of soda, and the revenue raised can be used to curb the obesity epidemic.

Here's a tip for investors: despite the economic depression, obesity is a blue chip stock--not the kind you eat with guacamole.