The Egg Grapefruit Diet

The egg grapefruit diet, like most fad diets, promises rapid weightloss by greatly reducing the types and quantities of food you eat. It is also known as the Mayo Clinic Diet, though the Mayo Clinic institution did not invent the diet, nor does it endorse it.

The key assumption in this diet variation involves the thermogenic properties of grapefruit, meaning that the body must use up more calories to process the food than the food actually contains. So, by eating more grapefruit, you’ll naturally produce a caloric deficit without expending any additional effort. So, what does this diet require, and does it offer results?

How It Works

As noted above, the egg grapefruit diet was developed with the assumption that grapefruit acts as a thermogenic food. The diet mainly works, though, like any other fad diet, by restricting the amount and variety of food in order to control the amount of calories you take in. Though the dieter is allowed to choose portion sizes in some categories, the diet provides a total of 800 calories per day. So, you’ll lose weight simply because your body needs about 1500-2000 calories to maintain your current weight.

The Meals

The meals in this diet are very regimented. The diet calls for the same three meals per day to be consumed over a continuous 12-day period:


  • Half a grapefruit or 8 oz of grapefruit juice
  • 2 eggs cooked any style
  • 2 slices of bacon


  • Half a grapefruit or 8 oz of grapefruit juice
  • Salad with your choice of dressing
  • Meat of any type and amount


  • Half a grapefruit or 8 oz of grapefruit juice
  • Salad with dressing
  • Meat or fish any type and amount, cooked in any style
  • Black coffee or tea

Other rules note that you should eat until you’re full, drink at least 64 oz of water per day, limit the amount of caffeine you take in and avoid all breads, desserts and potatoes. The diet also requires that you do not stray from the meal plan noted above, meaning no in-between-meals snacking of any kind.

Does the Diet Work?

Like most fad diets, you will see results at the end of the 12-day period. You should see weightloss in the range of 8-12 pounds and possibly more. However, note that this is a short-term fix. If you continue on the diet beyond the 12-day period, your body will begin to adapt to the lower amount of calories it is being presented with. It will basically start to go into starvation mode, and your metabolism will slow as your body naturally tries to retain all of the energy it can. This will, in turn, cause your weightloss to plateau and you will not see the same results following this period.

Benefits and Drawbacks

If you need to slim down quickly for an upcoming beach party, this diet will provide the initial surge of weightloss you’re looking for. However, you’ll find that the weight you initially lose will come back pretty quickly once you start eating normally again. One of the major drawbacks of all fad diets is the boredom associated with severely limiting your diet.

Again, you may be able to make do for an abbreviated stretch, but as for a long-term solution for overall weightloss and health, this diet is not the answer.


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