A classic, the grapefruit diet first became popular in the 1930's. Based on the claim that special enzymes in grapefruit enhance weight loss, the grapefruit diet was considered by experts to be just another fad diet. Any weight loss was attributed to the extremely low calorie intake allowed for the twelve days most versions recommend.
However, new research done at the Nutrition and Metabolic Research Center at Scripps Clinic by Dr Ken Fujioka has shown that grapefruit does, in fact, lower insulin levels and does increase weight loss.
New research has shown that grapefruit can lower insulin levels and increase weight loss
On the Grapefruit Diet, dieters eat half a grapefruit before each meal or drink 8oz unsweetened grapefruit juice. Calories are restricted to about 800 per day, and most complex carbohydrates are forbidden, except those on the list of recommended foods.
However, dieters can eat an unlimited amount of meat at lunch and dinner, must eat bacon for breakfast, and are encouraged to eat large amounts of vegetables, which can be prepared using butter.
The diet lasts for twelve days, and can be repeated after a break of at least 2 days.
List of Recommended Foods
List of Forbidden Foods
Is this a fad diet? The grapefruit diet does have some of the tell tale signs of a fad diet- the extreme restriction of carbohydrates and calories is not a healthy way to lose weight. But on the other hand, grapefruit is now believed to be a valuable diet aid, lowering insulin levels and encouraging weight loss.
The Grapefruit Diet- For
The Grapefruit Diet- Against