Inspiration GP/Shutterstock When it comes to losing weight, the fear of “ruining your metabolism” is widespread. Indeed, many people who have lost weight and then put it back on feel that every failed attempt leaves them worse off than before, with more fat, less muscle, greater hunger, lower energy, and an ever-diminishing ability to lose weight again. For those looking to lose weight, the so-called “yo-yo effect” has become an almost constant threat. According to this view, losing and regaini