Can you trust restaurant calorie counts? New study says not always

Diners who refer to a restaurant's website for calorie counts in an effort to eat healthy may be surprised to learn that they may be ordering meals with more calories than they think.

A new study by Tufts University nutrition researchers shows that nearly one out of five restaurant dishes has at least 100 calories more than what the restaurants states on its website.

Elizabeth Cohen, CNN Senior Medical Correspondent, joins Kiran Chetry and Ali Velshi today on American Morning to discuss the study and to explain how restaurants are accounting for such large discrepancies. For more information, check out Elizabeth's reporting here.