Body fat is the sum of all the fat on your body. “An easy way to determine if you have too much body fat is by using a bathroom scale,” Dr. Arem explains. “If you are overweight but still want to lose weight, focus on losing abdominal (belly) fat first and foremost, as it is more metabolically active than other locations like the thighs or arms.” But remember: Fat isn’t just stored around your belly; it’s hidden in places like your back and hips, too. “It’s important that everyone realizes that they carry extra pounds in these areas,” says medical expert Michael Roizen, M.D., author of The Hormone Cure . If you’re one of them—and really want to lose weight fast without any effort—head over here for his 10 tips for getting rid of stubborn belly bulge!