LOS ANGELES --Whether you diet, eat whatever you want, or are just naturally thin, every year you lose about ten percent of your fat cells. But before you celebrate with a sundae there's a catch. Scientists say: they're replaced with new ones.The lead scientist of the Swedish study says finding out that you have the same amount of fat cells regardless of what you do explains why it's so difficult to lose weight.
Those researchers also say they believe that number of fat cells is set in adolescence.
Experts hope their conclusions can be used in future research to treat obesity and it's causes.