The most accurate method uses large, indirect calorimeter machines in labs or hospitals under strictly controlled conditions. New handheld models are less precise, but they're an improvement over the widely used Harris-Benedict formula, which calculates your metabolism based on age, height, weight, gender and activity level. The Harris-Benedict is less accurate the more overweight you are.
The Oprah Winfrey Network announces four new series ("Elura and Michele Take Staten Island," "Iyanla Fix My Life," "Married to the Army: Alaska" and "Six Little McGhees") and additional episodes of two popular series: "Oprah's Master Class" and "Welcome to Sweetie Pies".
Grow your life! Get an exclusive look at Oprah's new farm, uncover 28 fresh ideas for happier living, and learn Bob Greene's top secret to eating smarter. Plus, find out how you can win a trip to Hawaii to have lunch with Oprah!