Skip to content

    Reviewed by Kathleen Zelman on February 14, 2012

    Sources

    Marion Nestle, PhD, MPH, Paulette Goddard Professor, Nutritionist and author, New York, NY.

    © 2008 WebMD, LLC. All rights reserved.

    WebMD Archive

    Video Transcript

    View Full Transcript

    Narrator: What is a calorie?

    Marion Nestle, PhD, MPH : A calorie is a measure of energy. It's an amount of heat that you can measure and um, you can burn food in a machine that tells you how much heat it creates. It works exactly the same way in the body. And most people need between 2000 and 3000 calories a day. And an Oreo cookie has 50 calories, you eat two of them, that's a 100. You eat 10 of them that's going to be 500 and a quarter of your calories for the day. So you have to get a feel for it.

    Healthy Recipe Finder

    Browse our collection of healthy, delicious recipes, from WebMD and Eating Well magazine.

    Top searches: Chicken, Chocolate, Salad, Desserts, Soup

    Heart Rate Calculator

    Ensure you're exercising hard enough to get a good workout, but not strain your heart.

    While you are exercising, you should count between...

    -
    Beats
    PER
    Seconds