The 3-Day Diet consists of three small meals per day, for a total of approximately 900 calories. Meals are made from simple foods, and a small amount of vanilla ice cream is allowed each day. Multiple websites market versions of this diet.
Breakfast on the first day of the 3-Day Diet is half a grapefruit, a piece of toast with 1 tablespoon of peanut butter and either water, black coffee or tea. Lunch on that day is 1/2 cup of tuna and another piece of toast, with the same beverage options. Other foods on the diet include hot dogs, saltine crackers, cottage cheese and vegetables.
This diet has a strict menu and doesn't allow for substitutions. It requires little effort in regards to shopping, and the only cooking is of vegetables, which can also be eaten raw. Exercise isn't part of the diet, and one website marketing the diet mentions that dieters typically don't feel energetic enough for exercise on this diet.
This diet is claimed to cause up to 10 pounds of weight loss. The diet can be repeated after four days of normal eating, and it can be repeated as many times as necessary for the dieter to reach his goal weight. There is no evidence of this diet being developed by nutrition experts.