Timeline: A History of Single-Food Diets
See also: Can man live on fruit alone? Read more about fruitarianism.
The Diet: Seven days of cabbage soup and limited fruits, veggies, and meat.
The Die-hards: Reagan-era flight attendants are said to rely on the low-cal soup to meet periodic weigh-ins. Sarah Michelle Gellar and Renée Zellweger supposedly use it for rapid slim-downs.