Eating lots of chocolate helps people stay thin, study finds

What's the best way to stay thin? A new study finds it's exercising and eating a healthy diet full of - chocolate? The study found that participants that ate chocolate for an average of twice of week and exercised roughly 3.5 times per week. But those who ate chocolate more frequently had smaller BMIs, a ratio of height and weight that's used to measure obesity. Read more details of the study here.