Nutrition Myths
Does green coffee bean extract help in weight loss?

SUMMARY

  • There is insufficient evidence that green coffee extract (GCE), with its main active ingredient chlorogenic acid, has weight loss effects.
  • The lack of strong evidence is because most studies were sponsored by companies producing GCE and, therefore, are biased.
  • The long term effects of this supplement have not yet been thoroughly investigated. Therefore, caution is needed before starting to take GCE.
Advertisement

ON THIS PAGE

Does green coffee bean extract help in weight loss?

The purpose of creating a green coffee extract was to produce a supplement containing a high level of and concentrated chlorogenic acid, which is believed to have various health properties including widely claimed weight loss properties.

The weight loss properties of these products usually come from the information on the products themselves, from scientific studies which are mostly biased (since they are sponsored by the industry) and from anecdotal evidence (which could also be initiated by the industry).

Green (raw) coffee beans are the best source of chlorogenic acid and the best way to obtain it is by extracting it.
Note: these products can contain caffeine, however decaffeinated types are also available.

There are other ways of obtaining chlorogenic acid but GCE supplements seem to be the best option. Brewing green beans produces an awful tasting beverage and roasting beans drastically reduces the amount of chlorogenic acid. (read more..)

Studies on the effectiveness of chlorogenic acid in weight loss

A recent systematic review from 2011 (a study that combined all of the available studies and used statistics to calculate the overall results) concluded that all studies regarding the GCE might have been industry bias, and the methodology of these studies had poor quality.

More independent and high quality studies are needed to show if GCE or chlorogenic acid are effective in weight loss. (1)

One study, for instance, which showed significant weight loss in overweight people taking GCE has been retracted by the authors with the reason that “The sponsors of the study cannot assure the validity of the data”. (2)

Two studies from 2007, with no reported conflict of interest, showed that chlorogenic acid reduces weight when consumed as an addition to instant coffee. This effect is attributed to the decrease of glucose absorption.

The first study, using 12 participants, showed that when chlorogenic acid is mixed with instant coffee it shows a 6.9% reduction in glucose absorption compared to when instant coffee is taken on its own.

The second study, using 30 overweight participants, showed that overweight people who had chlorogenic acid added to coffee, lost 3 times more weight over a 3 month period than those that had only instant coffee. (3)

There are also some rat and mice studies which have shown that chlorogenic acid may reduce fat accumulation and prevent weight gain. (4, 5)

More studies, with wider samples and independent from the industry, are needed.

Related Posts

Is coffee or tea a diuretic? If consumed on a regular basis, coffee and tea are not diuretic – they don’t dehydrate us. On the contrary, they can be counted towards the daily fluid intake.
Obesity in England – Statistics Latest statistics show that in 2014 around one-quarter of adults in England were obese and 2% of men and 4% of women were morbidly obese. The statistics also show differences between gender and ethnic/racial group.
Does fiber help you lose weight? A high fiber diet contributes to weight loss by: replacing high energy foods; increasing satiety through chewing; creating a bulk with water; slowing down the absorption of nutrients, fat and carbohydrate and reducing in...
Is taking green coffee bean extract safe? There is a lack of sufficient evidence that green coffee extract is unsafe, toxic or unhealthy. However, a small number of people have presented some side effects after having green coffee extract.
Obesity in United States – Statistics Latest statistics show that in the period between 2011 and 2014 more than 30% of adults in the United States were obese. The statistics also show differences between gender, ethnic/racial group.
Advertisement
Advertisement

Get updates

Receive regular updates on nutrition myths, facts and curiosities. All based on the latest scientific evidence.