New study published by the New England Journal of Medicine says that the type of calories you consume are less important than the amount of calories you consume.
Key words: "less important." Maybe you heard about this? This doesn't mean you can have a day's worth Snickers bars. That would be ridiculous. Nutrition does matter. Basically, the study is saying that you need to eat fewer calories to lose weight. Duh. That's no secret.
Consider though, that when you want to get more specific than general weight loss, i.e. firm up or lose fla (which applies to pretty much every client I've ever had), then the type of calories you consume absolutely do matter. But, if you're looking to lose 50 pounds or more, this study's guidelines should get you off to a great start.