These stunning before-and-after photos show why this unconventional diet is taking the industry by storm

Instagram/21 Day Fix The 21-Day Fix is taking over the diet industry. It comes from Beachbody, the same company that brought the world the notoriously intense at-home workouts Insanity and P90X. There's a nutrition plan that comes with the workouts, too. The 21-Day Fix promises that, in just 21 days, you'll see major results — a claim that has come under fire. The diet "is just what they call it — a fix. To maintain a healthy weight and mentality, you need to make a lifestyle change. I don...