What It Is: While these exists no one definitive grapefruit diet, all are based around a low-calorie approach, combined with a lot of grapefruit and grapefruit juice. The inclusion of this fruit is based on the idea that grapefruit contains a certain chemical or enzyme that aids weight loss.
Most of these approaches are short-term weight loss diets, lasting anywhere from a few days to a little more than a week.
Expert Verdict:
Ikeda: "I wonder how many vitamin deficiency diseases one could achieve by staying on this diet long enough? Quite a few, but rest assured it wouldn't be scurvy since we all know that grapefruit gives us the big C [Vitamin C]."
Ayoob: "Back to the 'Mayo' diet, there are grapefruit versions of this, and the Mayo diet was also akin to the 'Cabbage Soup' craze in the 80s. Skip them. They're 10- to 14-day temporary fixes."
Katz: "Diets based on a single food work by restricting choice. But over time, restricting choice is incompatible with both health and dietary pleasure. Unsustainable."
Do you have more information about this topic? If so, please click here to contact the editors of ABC News.
