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The Grapefruit Diet

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on 15 April 2014

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Transcript of The Grapefruit Diet

The original diet is from the 30's and requires a low calorie intake, high in protein and grapefruit with each meal. It claimed that there are enzymes in grapefruit that promote weight loss. Although the old diet doesn't aid in weight loss, there is a new study showing that eating grapefruit with each meal, with no change in your normal routine, can help you lose weight.
What's 'New & Different' about this Fad Diet?
Pros and Cons
-Does not burn fat
-May help with satiety
-Really just the a variation of the atkins diet with grapefruit

12 days on – 2 days off

1/2 Grapefruit or 4 oz. Grapefruit Juice (unsweetened)
2 Eggs (any style)
2 Slices Bacon
1/2 Grapefruit or 4 oz. Grapefruit Juice (unsweetened)
Meat (any style, any amount)
Salad (any kind of dressing)
1/2 Grapefruit or 4 oz. Grapefruit Juice (unsweetened)
Meat (any style, any amount) (fish may be substituted for meat)
Vegetables (any green, yellow, or red vegetables cooked in butter or any seasoning)
Bed Time Snack
1 glass tomato juice or 1 glass Skim milk
Vegetables Allowed
Red onions, green onions, bell peppers, radishes, cucumbers, broccoli, spinach, lettuce, cabbage, carrots, peas.
Vegetables to Avoid
White onions, potatoes, celery.
The Who and How
Who created this FAD Diet?
The Study
-Grapefruit contains phytochemicals (Naringin and Hesperidin)
-Grapefruit reduces Atherosclerosis (hardening of arteries)
-Grapefruit may reduce cancer and blood pressure
-Grapefruit Reduces Free Radicals

Pros of the Grapefruit Diet
1. When on the Grapefruit Diet, the requirements are to stay on an approx. 800 Calorie diet and by omitting high caloric and high sodium foods. This will increase the likelihood of losing weight.

2. When specifically talking about the celery, by not allowing this it supposedly decreases the amount of water weight that you would intake when consuming celery.

Why does the Grapefruit Diet have certain restrictions on food?

The Grapefruit Diet
Kelly D. Brownell PhD, invented this FAD Diet in the 1930's.

The main goal of this diet was to lose wieght at a rapid rate.
By Julia Pierce, Christopher Scanlon, Sophie Moody, and Delaney Smith
A Weeks Worth of Food
Kelly D. Brownell, PhD, is an internationally known expert on eating disorders, obesity, and body weight regulation. He's a psychology professor at Yale, where he also serves as professor of public health as well as director od the Yale Center for Eating and Weight Disorders. Brownell has also been the president of sereval national organizations, including the Society of Behavioral Medicine and the Division of Health Psychology of the American Psychological Association.
Does the Grapefruit Diet Work:
Cons of the Grapefruit Diet
- Eat only 800 calories a day during diet
-No fruits or vegetables during diet
-Consume excessive meat during diet
-Grapefruit may affect the absorption of medication
The Meal Plan

Despite its origin in the 1930's, the grapefruit diet didn't become popular until the 1970's, when is was erroneously propagated as the Mayo Clinic Diet. However, the Clinic has no connection to the diet and how the connection started is unclear. It significantly limits the amount of fruits and vegetables one eats while encouraging meat intake.
The study was conducted on 100 obese males and females and their weight and metabolic factors were monitored. The study was conducted for 12 weeks and the participants were broken up into three groups. The first group ate half a grapefruit with each meal and lost and average of 3.6lbs. The second group drank a serving of grapefruit juice three times a day and lost an average of 3.3lbs. The last group received no grapefruit and on average only lost about 0.5lbs. There was no change to their diet, but a slight increase in their exercise routine. There were many patients who lost more than 10lbs.

The Main Goal

The main point is that there is a physiological link between grapefruit and insulin as it relates to weight management. The chemical properties of grapefruit reduces levels of insulin which aids in weight loss.And with a smaller spike in insulin after a meal, it is easier for the body to process food for use of energy and less is stored as fat. The low insulin levels are what is promoting the weight loss. High levels of insulin can lead to sugars not being used efficiently for energy use and is more likely to be stored as fat. High insulin levels also cause people to feel more hungry causing them to eat more. And finally high levels of insulin prevent the body from breaking down fat.
Why do authors claim it's the best way to lose weight?
With the old diet it would be the best way to lose weight because of the rapid weight loss. The claim is 10 pounds in 10 days.
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