Research shows that 90% of diets fail, with most re-gaining the weight (and even more!) over a 5 year period. While there are lots of variable reasons why diets fail, one of the most important issues is constant hunger. Of course, when it comes to fat loss, one of the most basic principles is being in an energy deficit - eating less total food or calories than you burn per day. This is where the well-known recommendation: “eat less and move more” came from.