The first diet I'm going to introduce you to has been called by many names, the most popular of which are "The Three Day Diet" and "The Grapefruit Diet." This is a contemporary update to the plan first introduced as the Scarsdale Diet.
The Grapefruit Diet requires you to eat specific foods in limited quantities. Overall, you will be eating less than 1000 calories a day which is why it is a quick weight loss diet.
On a given day, breakfast might be 2 eggs, 2 slices of bacon, black coffee and a grapefruit. Lunch would consist of salad with salad dressing and unlimited lean meat. Dinner would be any non-starchy vegetables, unlimited fish, and half a grapefruit. As a bedtime snack, you could have 8 ounces of skim milk.
