The Mayo Clinic Grapefruit Diet: 2011 Reviews "Fat Burning Enzymes" of Grapefruits?

The Mayo Clinic Grapefruit Diet has been a mainstay in American dieting for nearly 80 years. In spite of its longevity no one seems to want to claim ownership to this popular diet fad.

Grapefruit Diet Reviews

Often referred to as the Hollywood diet or the Mayo clinic diet neither Hollywood or the Mayo clinic will endorse it. Seems a bit odd for something that's been around 80 years. Anyway, below are some FAQ's for answers. You can skip all the way down for the "bottom line" if you're in a hurry.

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Is Mayo Clinics Grapefruit Diet Theory True?

Somewhere, one day...perhaps many centuries ago a seemingly harmless theory that a grapefruit carries "fat burning enzymes" began to propagate so quickly that the grapefruit diet was born.

Throughout the years and even today many dieters endorse the benefits of the Mayo Clinic Grapefruit Diet in spite of a lack of any real experimentation that would support the diet itself.

In fact as of May 2008, recent experiments and medical research not to mention user testimonial all seem to unanimously discredit the age old diets legitimacy.

However, I must be clear at this point. I don't think anyone can dispute the multiple nutritional and health benefits of the grapefruit alone. Research has in fact concluded the following regarding grapefruits

Benefits of the Grapefruit:
  • Great source of Vitamin C
  • Great source of Fiber
  • Pink and Red hues are high in antioxidants
  • Active in lowering cholesterol
  • Considered a "Super" or "Power" food in select diets
  • Low Glycemic Load or impact on blood sugar levels

What's better is if you include the grapefruit into your diet your health stands to benefit in numerous ways. Question is can the whole grapefruit DIET take the "more is better" theory and truly force weight loss. Before answering that you'll find a copy of the Mayo clinic Diet below...

Which version of the Mayo Clinic Grapefruit diet is best?

*Copy of the Mayo Clinic Grapefruit Diet

2 eggs with 2 slices of bacon, black coffee or tea (no sugar),
1/2 grapefruit or 8 ounces 100% pure grapefruit juice.
Salad with salad dressing, meat (4 to 6oz.), 1/2 grapefruit
or 8 ounces 100% pure grapefruit juice.
Fresh non-starch vegetables (NO: peas, beans, corn, or any type
of potatoe) salad, unlimited meat or fish, 1/2 grapefruit or 8 ounces
of 100% pure grapefruit juice.
Bedtime Snack
8 ounces skim milk or sometimes 8 oz. of tomatoe juice

*The mayo clinic grapefruit diet offers several diet versions, the above being
a more "generous" version based on numerous other "official" plans as of May 2008.
Some versions were either dated, incomplete, or offered so few daily calories that
we felt it to be too dangerous to include on this site.

How will this diet cause me to lose weight?

The plan is really a low carb/low fat/low caloric diet plan. It therefore has a low success rate especially compared to Diet Solutions.
A quick review of the grapefruit diet copy above suggests weight loss will be about 100% attributed to the amount of calories (or lack thereof) you consume. Total calories amount to around 800-1000 calories daily.

"The claim is as much as 10 lbs. in 12 days which is temporarily true. Most of that weight will be water and possibly lean muscle mass as opposed to fat."

"The claim is as much as 10 lbs. in 12 days which is temporarily true. Most of that weight will be water and possibly lean muscle mass as opposed to fat."

The big mystery with this diet is how grapefruit enzymes stimulate fat burning? What enzymes? And if so why this enzyme doesn't exist in oranges, lemons, and other citrus fruits?

"I'm going to apologize in advance for this statement but there's just no study anywhere as of May 2008 to prove that grapefruits have a magical, fat burning enzyme."

Actually, we are currently reviewing the popular lemonade diet. Nonetheless, there's no recorded research that substantiates the grapefruit enzyme theory.

What theory is substantiated beyond doubt is that these types of low calorie diets triggers your body into famine mode and it adapts very efficiently.

By adapting the body will turn the burners down on your metabolic rate in preparation for future reduced calories. Since you've flipped the switch to "survival mode" your body responds by burning food slower.

Once you stop losing weight (diet plateau) and then resume or fall back to your normal diet, you will inevitably rebound all your weight back...and then some.

What are the experts saying?

You can find a whole host of research that supports adding grapefruit to your diet for reasons mentioned above. Merely adding 1/2 a grapefruit or 4 oz. of grapefruit juice to each meal has shown to reduce weight by 3 pounds in 3 weeks according to a small study funded by the Florida Department of Citrus.

"Studies can only point to the health benefits of grapefruits not the Mayo Clinic Grapefruit Diet itself."

Outside of that one, small study we have no recorded research proving that the Mayo Clinic grapefruit diet either through grapefruit eating or food combinations forces weight loss. Thus weight loss can only be attributed to severe calorie restriction.

Connie Diekman, president of the American Dietetic Assoc. says, "There is no evidence that grapefruit has fat-burning enzymes nor is it a magic bullet for weight loss". In fact in spite of the "diets" rules you may do just as well substituting grapefruits with any other similar fruit or vegetable.

The Bottom Line:

The Mayo Clinic Grapefruit diet like any other severely restricted calorie diet can offer quick superficial weight loss. The downside is the inevitable rebound of weight gain once you resume to even a low calorie diet let alone a normal diet.

You can impress your friends and yourself perhaps by being 10 pounds lighter in under 2 weeks. But in 2 months you may very well find yourself 10 pounds heavier than you were in the beginning.

The limited variety of foods coupled with caloric restriction is a recipe for boredom, taste fatigue, and ultimate failure. The bottom line is we wouldn't advise anyone to sell out to this type of caloric deprivation when you have several other fast and healthier weight loss alternatives available. The Diet Solution for example is a healthy and easy alternative to the mayo clinic grapefruit diet since it utilizes the fat loss benefits of citrus fruits but it's safe and without the rebound effect.