superdiet

plural superdiets

1. A diet with remarkable health or slimming properties.

   In short, there is no such thing as a superdiet to increase one's potential.

   1983, James M Corry, Consumer health: facts, skills, and decisions

   1 more example

   John just "finished" one of the superdiets you've read about, and when he got down to his goal weight — 150 pounds — he began eating everything he liked...

   1979, Frank Konishi, Eat anything exercise diet: how to be slim and fit for life