Weight Loss Answers


Hypnosis Works for Weight Loss

because ...

"Words DO Carry Weight!"


Killer Grapefruit Juice!

The Sequel


Does The Grapefruit Juice Diet Work?

In This Article:

How Does The Grapefruit Diet Work?

Have Any Credible Studies Been Showing That It Does Work?

Conclusion To This Gripping Tale


How Does The Grapefruit Diet Work?

Have you ever heard of Voodoo?  How about the Placebo Response?  Well, these may be the best reasons yet for why this diet appears to work.

The fact of the matter is that despite one apparently well conducted study, no one seems to know exactly why it works but, of course there are some nifty sounding answers.

For example, many have believed that there is a secret enzyme in grapefruit that 'boosts your metabolism'. 

However, the fact is that Grapefruit does not boost your metabolism.  The truth is that there are lots of theories and nothing solid.

I'll tell you what will get a boost if you eat enough grapefruit....your need to go to the toilet.  You see, if you ingest enough vitamin C, you will start to have diarrhea.  I'm serious!  The thing is, it is well-known that a lot of overweight people are prone to carrying excess amounts of fecal matter.   So, it may be that enough grapefruit (juice) and they are slowly getting rid of it.  However, this is pure speculation. 

Have any credible studies been done showing that it does work?

What is not 'gross' speculation however, is the one study (that I'm aware of) conducted on the Grapefruit Diet did produce some benefits. 

So here's the gist of the study: In a study conducted by Dr. Ken Fujioka of the Scripps Clinic based in California, 100 obese men were put on the diet for 12 weeks.  As is reported by the Dr. Fujioka:

"On average, participants who ate half a grapefruit with each meal lost 3.6 pounds, while those who drank a serving of grapefruit juice three times a day lost 3.3 pounds. However, many patients in the study lost more than 10 pounds."

What this means to you (on the surface at any rate), is that just by eating  grapefruit three times a day, you'll probably lose 10 pounds or more in 3 months.

I love how scientific reports lie.  Check out the small print:

"Our study participants maintained their daily eating habits and slightly enhanced their exercise routine; the only dietary change was the intake of Florida grapefruit and grapefruit juice."

What? They "enhanced their exercise routine" ? What does that mean?

I'll tell you exactly what it means.  It means that the grapefruit juice, in and of itself, probably did NOT have had anything to do with the weight loss. 

Here's the truth: If you boost your physical activity by a tiny amount, you can easily burn 100 calories extra per day and in just about a month, you can lose one pound of fat.  And, the study was 3 months long so the math shows that a tiny increase in physical activity levels will produce the results they claim resulted from the grapefruit juice diet itself.

The point here is that this one, single study does NOT conclusively prove that the grapefruit juice had anything to do with the weight loss.

Another complete B.S. point about the study is this:

"The researchers speculate that the chemical properties of grapefruit reduce insulin levels and encouraged weight loss."

How can they say that when exercise was introduced into the study?  Exercise has a powerful influence on insulin levels.  Most likely a much greater influence than some mysterious grapefruit component that eludes researchers.

Okay.  That's my rant.  So, should you do the diet or what?


According to my research, evidence supporting the diet's effectiveness seems really weak.  To me, the one study is flawed and, the other flaw is that there is only one study. 

And here are three other points for consideration:


1)  How many dieters are seriously excited by the prospect of losing roughly one pound per month? 


2) Despite the bitter taste, grapefruit has a lot of sugar in it.  Adding a daily dose of extra sugar to one's diet is not likely to help with weight loss.


3) The diet probably works to some degree simply because it is essentially a modified form of the Atkin's diet which is clinically well documented to work. 


Finally, it should be noted that hypnosis can definitely help motivate a person to safely and persistently increase their daily physical activity levels such that they can slowly but certainly lose weight. 

And, hypnosis can help a person to stay motivated in the face of slow results.


Remember, doctor's studies support the use of hypnosis to lose weight. Click here to read more.

If you have any questions, please feel free to contact me and I'll do my best to help.

Warm Regards


Top of Page


(1) To read the public version of the grapefruit/weight loss study, please click here.