Think about it – when did a muffin become as big as your head? The average bagel 20 years ago was 3 inches in diameter, while today it's 6 inches in diameter. 5 ounces, while today it's 8 ounces. The ...

Cynthia Sass is a nutritionist and registered dietitian with master's degrees in both nutrition science and public health. Frequently seen on national TV, she's Health's contributing nutrition editor ...