In your 40s and not been able to cut that extra flab? It could be the end of 'good' brown fat in the back of your neck. As we age thermogenic activity of brown fat - good fat that helps burn bad white fat around our bellies - slows down claimed a new study. To beat this those on the other side of the 40s would have to clock extra hours on the treadmill and eat more salads than their younger counterparts in order to shed weight said the research published in The FASEB Journal. 'Our brown fat stops working
