Does The Green Coffee Bean Extract Work?

Written by Dr. Steve Chaney on . Posted in current health articles, Healthy Living, Supplements and Health

Author: Dr. Stephen Chaney

 does green coffee bean extract work

Does the green coffee bean extract work? The claims sounded so appealing. You could just take this green coffee bean extract and the pounds would melt away. You didn’t need to exercise or change your diet.

Your first reaction when you heard those claims was probably “Right, when pigs fly. I’ve heard this kind of stuff before. It’s just too good to be true.”

But then you were given a pseudo-scientific explanation about how it was the chlorogenic acid in the green coffee bean extract that was responsible for its amazing properties (What they didn’t tell you was that chlorogenic acid is present in all roasted coffees). You were told that it was backed by a clinical study showing that people lost 17.7 pounds, 10.5% of their body weight and 16% of their body fat in 22 weeks without diet and exercise.

To top it all off you were told that it was endorsed by Dr. Oz on his TV show and provided with a video clip to prove it. After all of that you were probably tempted to say “Maybe…just maybe… these amazing claims might be true.” You may have even been tempted to try it.

Were the claims true? Is green coffee bean extract the miracle weight loss product that everyone has been looking for? Or was it just another bogus weight loss product?

 

Is Green Coffee Bean Extract Bogus?

Evidently the Federal Trade Commission did not consider the claims about green coffee bean extract to be true. The FTC sued one of the companies that manufactured and sold green coffee bean extract for promoting a “hopelessly flawed study” to support the weight loss claims for their product.

The FTC alleged that:

  • The study was too small, at 16 subjects, to provide convincing data.
  • The study contained a number of critical flaws in the design and results of the study. For example, the greatest weight loss actually occurred in the placebo group.
  • The lead investigator in India actually falsified the results.
  • The company knew or should have known that this botched study didn’t prove anything.”

The manufacturer eventually agreed to pay $3.5 million to the FTC to settle their complaint. Basically, the company agreed with the FTC that there was no evidence to back their weight loss claims.

 

How Did Dr. Oz Get It So Wrong?

What about Dr. Oz’s endorsement? In Dr. Oz’s 2012 show segment he called green coffee bean extract “the magic weight loss cure for any body type.” The most puzzling aspect of this whole saga is how Dr. Oz got it so wrong.

After all, he is a trained neurosurgeon. He is Vice Chair of the Department of Surgery at Columbia University. He understands the principles of evidence-based medicine. Evidence-based medicine simply means that it is a physician’s responsibility to check the scientific evidence before recommending a treatment to a patient. Yet he never even looked into the supposed “clinical study” backing green coffee bean extract’s weight loss claims.

In a Senate hearing this past June Dr. Oz apologized. He said: “For my colleagues at the FTC, I realize I have made their jobs more difficult.”

 

How Can You Protect Yourself Against Weight Loss Scams?

green coffee bean extractThere are dozens, if not hundreds, of new weight loss products appearing on the market every year. The FTC is doing its best to police the claims that are being made, but they are clearly overwhelmed. And even when they have an airtight case, it can take years for them to force a company to stop making false claims.

So, how can you protect yourself against weight loss scams? How can you avoid wasting your money on products that don’t work, or may even harm your health? I advise a little healthy skepticism.

  • Be skeptical about the claims. The old adage “If it sounds too good to be true, it probably is [too good to be true]” is always good advice.       In a previous “Health Tips From the Professor” I discussed the the FTC’s recommendation for “7 Easy Ways To Spot Fad Diets”. That one is probably worth printing out and keeping handy so that you can review it the next time a new diet program comes out.
  • Be skeptical about the studies. The bottom line is that not all clinical studies are reliable. I realize that it is extremely difficult for a non-scientist to evaluate the validity of clinical studies. My best advice is to go online and see what other experts are saying about the study and the claims. There are a number of “fact checker” blogs online that focus on careful scientific analysis of product claims and the “studies” that support them.
  • Be skeptical about the endorsements. Unfortunately, there are far too many examples of well known doctors who have endorsed bogus product claims on their TV shows or in their blogs. That makes it even more difficult for the layman to separate fact from fiction. My advice is to simply ask the question: “Does their blog or TV show feature something novel, something spectacular, and/or something sensational…every single week?”

My belief is that these experts all start out with good intentions. However, to develop a really big audience and keep them engaged they feel pressured to deliver novel and sensational health news every single week. The reality is that there are not advances every single week that are novel, sensational… and scientifically accurate. Eventually, they feel pressured to sacrifice accuracy for novelty.

That is why my blog is different. I don’t promise you spectacular and sensational news every week, but I do promise you accuracy. I will share the latest headlines, but I will tell you both their strengths and their weaknesses. Ultimately, it is your responsibility to protect yourself against weight loss scams and I tell you how below. Fortunately, what you can always count on from me is I will be honest with you.

So, does the green coffee been extract work?

 

The Bottom Line

    1. According to the FTC the green coffee bean extracts that were so widely promoted a couple of years ago were yet another example of bogus weight loss products. The FTC sued one of the companies that markets and sells green coffee bean extract for promoting a “hopelessly flawed” clinical study to advertise their product, and the company has recently settled with the FTC for $3.4 million.
    2. The only way that you can protect yourself from bogus weight loss products is to be skeptical. I discuss the questions you should ask in more detail above, but in short:
      • Be skeptical of claims that sound too good to be true.
      • Be skeptical of the clinical studies the companies quote to support their claims.
      • Be skeptical of expert endorsements. This product was even endorsed by Dr. Oz on his TV show.

 

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure or prevent any disease.

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Comments (5)

  • Mike Lucas

    |

    Great info Dr. Chaney! Thanks!

    MJ & Jenn

    Reply

  • Caroline

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    When learning to do Research, I learned to look into studies, whether they were RCTs, the premise, the actual testing, and the P value. I have found Dr. Oz pushes a lot of non-back-upped stuff without any scientific background. Your articles help me to explain the real facts and validates my research and sharing information with them. Thank you.

    Reply

    • Margaaret W. Chaney

      |

      I am cautious but had such faith in Dr. Oz I fell for the offer, big time. So disappointed I don’t even watch him anymore. Sincerely, Margaret

      Reply

  • Amit Dabas

    |

    Lets not blame the Coffee here. A message should not go that all Coffee Bean Extracts are bad. People should be educated to identify between a good and a bad product.

    How to judge a good green coffee – look for the CGA content (chlorogenic acid content). The CGA should be minimum at 45% or more. For an extract and CGA = 50% …. a good dosage to make it potent will be 800mg – 1gm / day. 2 tabs – 1 Am and 1 Pm

    Second, Green Coffee works even better when paired with a good Green Tea. So, 500 mg coffee + 500 mg Green Tea will work even better. Please study – How to evaluate a good green tea 🙂

    Reply

    • Dr. Steve Chaney

      |

      I’m sorry, but if we are talking about weight loss, there is no good evidence that the chlorogenic acid content of green coffee bean extract makes any difference.

      Reply

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Latest Article

Is Our Microbiome Affected By Exercise?

Posted November 6, 2018 by Dr. Steve Chaney

Microbiome Mysteries

Author: Dr. Stephen Chaney

is our microbiome affected by exerciseIn a recent post,  What is Your Microbiome and Why is it Important,  of “Health Tips From The Professor” I outlined how our microbiome, especially the bacteria that reside in our intestine, influences our health. That influence can be either good or bad depending on which species of bacteria populate our gut. I also discussed how the species of bacteria that populate our gut are influenced by what we eat and, in turn, influence how the foods we eat are metabolized.

I shared that there is an association between obesity and the species of bacteria that inhabit our gut. At present, this is a “chicken and egg” conundrum. We don’t know whether obesity influences the species of bacteria that inhabit our gut, or whether certain species of gut bacteria cause us to become obese.

Previous studies have shown that there is also an association between exercise and the species of bacteria that inhabit our gut. In particular, exercise is associated with an increase in bacteria that metabolize fiber in our diets to short chain fatty acids such as butyrate. That is potentially important because butyrate is a primary food source for intestinal mucosal cells (the cells that line the intestine). Butyrate helps those cells maintain the integrity of the gut barrier (which helps prevent things like leaky gut syndrome). It also has an anti-inflammatory effect on the immune cells that reside in the gut.

However, associations don’t prove cause and effect. We don’t know whether the differences in gut bacteria were caused by differences in diet or leanness in populations who exercised regularly and those who did not. This is what the present study (JM Allen et al, Medicine & Science In Sports & Exercise, 50: 747-757, 2018 ) was designed to clarify.  Is our microbiome affected by exercise?

 

How Was The Study Designed?

is our microbiome affected by exercise studyThis study was performed at the University of Illinois. Thirty-two previously sedentary subjects (average age = 28) were recruited for the study. Twenty of them were women and 12 were men. Prior to starting the study, the participants filled out a 7-day dietary record. They were asked to follow the same diet throughout the 12-week study. In addition, a dietitian designed a 3-day food menu based on their 7-day recall for the participants to follow prior to each fecal collection to determine species of gut bacteria.

The study included a two-week baseline when their baseline gut bacteria population was measured, and participants were tested for fitness. This was followed by a 6-week exercise intervention consisting of three supervised 30 to 60-minute moderate to vigorous exercise sessions per week. The exercise was adapted to the participant’s initial fitness level, and both the intensity and duration of exercise increased over the 6-week exercise intervention. Following the exercise intervention, all participants were instructed to maintain their diet and refrain from exercise for another 6 weeks. This was referred to as the “washout period.”

VO2max (a measure of fitness) was determined at baseline and at the end of the exercise intervention. Stool samples for determination of gut bacteria and concentrations of short-chain fatty acids were taken at baseline, at the end of the exercise intervention, and again after the washout period.

In short, this study divided participants into lean and obese categories and held diet constant. The only variable was the exercise component.

 

Is Our Microbiome Affected By Exercise?

is our microbiome affected by exercise fitnessThe results of the study were as follows:

  • Fitness, as assessed by VO2max, increased for all the participants, and the increase in fitness was comparable for both lean and obese subjects.
  • Exercise induced a change in the population of gut bacteria, and the change was comparable in lean and obese subjects.
  • Exercise increased fecal concentrations of butyrate and other short-chain fatty acids in the lean subjects, but not in obese subjects.
  • The exercise-induced changes in gut bacteria and short-chain fatty acid production were largely reversed once exercise training ceased.

The authors concluded: “These findings suggest that exercise training induces compositional and functional changes in the human gut microbiota that are dependent on obesity status, independent of diet, and contingent on the sustainment of exercise.” [Note: To be clear, the exercise-induced changes in both gut bacteria and short-chain fatty acid production were independent of diet and contingent on the sustainment of exercise. However, only the production of short-chain fatty acids was dependent on obesity status.]

 

What Does This Study Mean For You?

is our microbiome affected by exercise gut bacteriaThere are two important take home lessons from this study.

  • With respect to our gut bacteria, I have consistently told you that microbiome research is an emerging science. This is a small study, so you should regard it as the beginning of our understanding of the effect of exercise on our microbiome rather than conclusive by itself. It is consistent with previous studies showing an association between exercise and a potentially beneficial shift in the population of gut bacteria.

The strength of the study is that it shows that exercise-induced changes in beneficial gut bacteria are probably independent of diet. However, it is the first study to look at the interaction between obesity, exercise and gut bacteria, so I would interpret those results with caution until they have been replicated in subsequent studies.

  • With respect to exercise, this may be yet another reason to add regular physical activity to your healthy lifestyle program. We already know that exercise is important for cardiovascular health. We also know that exercise increases lean muscle mass which increases metabolic rate and helps prevent obesity. There is also excellent evidence that exercise improves mood and helps prevent cognitive decline as we age.

Exercise is also associated with decreased risk of colon cancer and irritable bowel disease. This effect of exercise has not received much attention because the mechanism of this effect is unclear. This study shows that exercise increases the fecal concentrations of butyrate and other short-chain fatty acids. Perhaps, this provides the mechanism for the interaction between exercise and intestinal health.

 

The Bottom Line

A recent study has reported that:

  • Exercise induces a change in the population of gut bacteria, and the change was comparable in lean and obese subjects.
  • Exercise causes an increase in the number of gut bacteria that produce butyrate and other short-chain fatty acids that are beneficial for gut health.
  • These effects are independent of diet, but do not appear to be independent of obesity because they were seen in lean subjects but not in obese subjects.
  • The exercise-induced changes in gut bacteria and short-chain fatty acid production are largely reversed once exercise training ceases.

The authors concluded: “These findings suggest that exercise training induces compositional and functional changes in the human gut microbiota that are dependent on obesity status, independent on diet, and contingent on the sustainment of exercise.”

For more details and my interpretation of the data, read the article above.

 

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure or prevent any disease.

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