A reason to not diet?

Air Pollution Raises Obesity Risk For Young Animals, Regardless of Diet

Now this research concerns itself with non-human animals (mice specifically), but it does provide interesting insight into the non-diet factors which may be at play in soaring obesity rates and the way environmental pollution influences development: A new study shows that exposure to polluted air early in life, at levels that correspond to the amount of fine particulate pollution found in many US cities, can lead to increased accumulation of abdominal fat and insulin resistance, even if a healthy diet is followed.


That's the world from researchers who exposed three-week old mice to polluted air for six hours a day, five days a week, for 10 weeks--a time period roughly corresponding in humans from being a toddler to adolescent.


The mice exposed to the polluted air had larger and more fat cells in their abdomens and higher blood sugar level than did mice fed exactly the same diet but which breathed clean air.

That explains it. So pop open that can of brew and put some ketchup on those fries - it may not really matter.