Losing weight with minimal effort sounds like a win-win situation. But are liquid diets too good to be true?What Are Liquid Diets? Like the name suggests, liquid diets mean you're getting all, or at least most, of your calories from drinks. Some liquid diets are limited to fruit or vegetable juices, or shakes, that replace all of your meals, taken three or four times a day. You do some of these diets on your own. Others need medical supervision. Other types of liquid diets replace just one or