Keith Ayoob answers the question: 'What are Calories, Why Do They Matter?' February 1, 2009 -- Question: What is a calorie and why is it important to know how many calories there are in certain foods?

Calories can be confusing — but they don't have to be. From consuming them to burning them, we got expert answers to your most-searched questions about calories and what they mean for our weight and ...

Jillian Kubala, MS, is a registered dietitian based in Westhampton, NY. Jillian uses a unique and personalized approach to help her clients achieve optimal wellness through nutrition and lifestyle ...

Jillian Kubala, MS, is a registered dietitian based in Westhampton, NY. Jillian uses a unique and personalized approach to help her clients achieve optimal wellness through nutrition and lifestyle ...

Corrections & clarifications: An earlier version of this story misspelled the name of the spokesperson for the Academy of Nutrition and Dietetics. She is Caroline Susie. Few things are as essential as ...

You may have a pretty good idea of how much you should be eating per day. Or you might not have a clue and simply tuck into whatever you fancy. But understanding how calories – a unit of energy – ...

Did you know that a calorie label only has to be accurate within twenty percent? It’s a wide margin, but it exists for a reason: calories are complicated. Did you know that a calorie label only has to ...