What's the biggest difference between food back in the 1950's and today? Portion size. According to the CDC, meals are four times bigger now compared to what they once were and as a result, people are 26 pounds heavier. Yeesh! No wonder we're all so fat.
If you eat more than you need, you gain more weight than you want. Simple enough, right? Blame our obesity problem on the restaurants! Alternatively, for those impossibly beautiful people who stay skinny even in our fattened up food era, you guys are getting a significantly better deal! [Making Health Easier via Serious Eats]