Green Coffee Bean Extract

Green Coffee Bean ExtractGreen coffee bean extract is a supplement that has been touted for its miraculous ability to contribute to weight loss. Made from unroasted coffee beans, green coffee extract contains higher amounts of chlorogenic acid than traditional coffee made from roasted beans. The extract increased in popularity when TV doctor, Dr Mehmet Oz, revealed the results of an experiment in which persons given the green coffee bean extract lost more weight than a control group. The extract has other benefits including reducing blood pressure. However, there are potential side effects such as negative interactions with other medications.

What is Green Coffee Bean Extract?

Green coffee bean extract, abbreviated GCBE, is an extract obtained from unroasted green coffee beans. Green coffee typically refers to coffee produced from ripe coffee beans that have not been roasted, and not from beans that are green in color or unripe. The most common coffee plants are the Arabica and Robusta. The beans used for the extract may be referred to as green, natural, raw or unroasted beans. Regular coffee is made by first roasting the ripe beans before they are ground and brewed for drinking. The roasting of the beans makes the coffee more palatable, with a smoky taste achieved. The taste is usually the primary attraction for coffee made from roasted beans.

Coffee beans contain chlorogenic acid. Chlorogenic acid is an antioxidant which helps to speed up weight loss by impacting the way the body metabolizes fat. This acid also decreases the rate at which glucose is released into the blood stream. It is these qualities of coffee beans that make them useful to a weight loss regimen. Chlorogenic acid is found in its highest concentration in the unroasted coffee beans. The heat used in the roasting process has a negative effect on the chlorogenic acid content as much of it is destroyed by the heat. In addition to its higher chlorogenic acid content, green coffee bean extract also has less caffeine than regular coffee and thus has a lower stimulating effect. The extract made from the beans is packaged into capsules and have a chlorogenic acid content ranging, ideally, from 40 percent or more.

Alternative names

Green coffee or the extract obtained from it may be called one of several names including Arabica green coffee beans, Café marchand, Coffea arabica, Coffea arnoldiana, Coffea liberica, Coffea robusta, GCBE, GCE, green coffee extract, green coffee powder, pure coffee bean, raw coffee, raw coffee extract, unroasted coffee bean extract or Robusta green coffee beans, among others. It is also well-known by the patented commercial brand names Svetol® and GCA, which produce the extract from Robusta coffee beans.

Extraction method

Green Coffee BeansGreen coffee bean extract is produced from the seeds of the Arabica or Robusta coffee plant, more specifically from the green, mature beans. A mature coffee bean is contained in the coffee berry which is usually bright red in color. Once ripe, the berries are dried and the green seeds removed from inside. To produce regular coffee the mature beans are usually roasted, turning the seeds brown, prior to being ground and packaged. Roasting gives regular coffee its unique smoky taste and scent.

To produce green coffee bean extract, on the other hand, the beans are not roasted as this destroys much of the chlorogenic acid found in coffee beans. It is this acid that supplies the many health benefits for which green coffee beans have come to be known. The mature beans are soaked and the extracted liquid is then concentrated and used in the production of the extract. The extract comes in the form of capsules, usually 400 mg each.


The supplements made from green coffee bean extract are packaged into 400 mg capsules which are taken thrice daily for optimal results. Each capsule should ideally contain at least 42 percent chlorogenic acid. However, because the contents of supplements are not legally regulated, different manufactures may produce supplements with varying amounts of chlorogenic acid.


The main benefit of green coffee bean extract is its high chlorogenic acid content. Chlorogenic acid is an antioxidant which contributes to several essential body functions, including aiding in the body’s ability to produce glucose from amino acids plus slowing the rate at which this glucose is absorbed into the blood stream.

Green coffee bean extract has several health benefits. With respect to weight loss, green coffee bean has been marketed as a stand-alone supplement that contributes to weight loss without the need to make other changes to the regular regimen. The chlorogenic acid content impacts how the body metabolizes fat and sugar. By decreasing the rate at which glucose is released into the blood stream, chlorogenic acid helps to control blood sugar levels. In addition it increases the body’s ability to burn fat by enhancing the liver’s metabolism. Overall this leads to decreased weight gain as a result of lowered fat absorption. Balanced blood sugar levels has also been associated with increased energy levels as well as improved hormonal functional and mental clarity.
Green coffee bean extract may also have positive effects on other conditions such as diabetes, heart disease and high blood pressure. As an antioxidant, chlorogenic acid may help to lower blood pressure. It helps with diabetes by helping to balance the glucose content in the blood.

Green coffee bean extract is also an anti-inflammatory and can facilitate the removal of free radicals from the body by detoxifying the liver and blood. This also leads to increased energy and vitality and contributes to a younger, healthier looking appearance.

Side effects

The use of green coffee bean extract as a supplement is not without potential side effects. Although it contains less caffeine than regular coffee brewed from the roasted beans, some caffeine-related complications are still possible. High concentrations of caffeine in the body may lead to anxiety, headaches, insomnia, nervousness and possibly irregular heartbeat. Further symptoms related to caffeine withdrawal, such as depression and difficulty concentrating, may also develop once the supplement is removed from the daily regimen. Additionally, caffeine may interact negatively with some medications including those for diabetes and depression.