Boston: Want to shed your baby fat? Wait, don`t do it just yet, for a new study has revealed that such a fat is good - as long as it is calorie-burning ``brown fat``. Brown fat burns off calories and generates heat in babies and small mammals. Most of the body fat is white fat, which also provides insulation but stores calories. It becomes "bad" fat when an individual have too much. The "good" fat-brown fat-was considered essentially nonexistent in human adults. The new study has found that adults have much more of this type of fat than previously believed. "We now know that it is present and functional in adults," said the study`s lead author, Dr Aaron Cypess, MMSc, of the Joslin Diabetes Centre in Boston. "Three ounces of brown fat can burn several hundred calories a day," he added. In the new study involving 1,970 study participants, researchers measured the patches of brown adipose tissue-brown fat-in people with the help of high-tech imaging method that combines positron emission tomography and computed tomography, called PET/CT. By evaluating biopsy tissue of what appeared to be brown fat, the authors confirmed that they were, indeed, looking at stores of brown fat.
They also discovered that brown fat is most abundant in young women and least frequent in older, overweight men. In fact, women were more than twice as likely as men to have substantial amounts of brown fat. "One theory for this is that women may have less muscle mass overall, so they need more brown fat to generate heat and keep warm," Cypess said. The study appears in New England Journal of Medicine. ANI
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