Calorie needs can fluctuate like your weight - MSNBC

Many of today’s nutrition recommendations are based on calorie needs, whether for weight control or for foods that fit in a healthy diet.
Unfortunately, most of us apparently can't identify our calorie needs. In a 2006 survey of 1,000 U.S. adults, 88 percent of respondents could not accurately estimate how many calories they should eat every day.

For a more accurate estimate of recommended calories that reflects your height and weight, go to www.mypyramid.gov and click on MyPyramid Plan. Recalculate your needs with every five to 10 pound change, since calorie needs change with weight.