Timeline: A History of Single-Food Diets
See also: Can man live on fruit alone? Read more about fruitarianism.
The Diet: Miami doctor Sanford Siegal's plan: Six (now nine) fiber-and-protein-packed cookies replace breakfast and lunch; dinner is 500 to 700 calories of lean protein and veggies.
The Die-hards: The diet makes a comeback, circa 2008, among the likes of Guy Ritchie and Howard Stern.