Green Coffee Bean Extract
• Chlorogenic Acids, GCBE, CGA
Just as black tea is made by processing green tea leaves from their original state, ordinary coffee is made by roasting green coffee beans. This processing alters the chemical makeup of the plant product. In an analogy to the medicinal study of
Like green tea, green coffee bean extracts (GCBE) contains strong
What Is Green Coffee Bean Extract Used for Today?
Animal studies have found evidence that chlorogenic acids from green coffee bean extract can reduce blood pressure. 1
GCBE products are sometimes said to help prevent diabetes; however, this claim derives only from weak evidence involving consumption of ordinary coffee,
Roasted (as opposed to green) coffee beans contain the substances kahweol and cafestol, which appear to increase
levels of LDL ("bad" cholesterol).
In the large human trial of GCBE for hypertension noted above, the extract was most effective when taken at a dose of 185 mg daily.
Since green coffee bean extract typically contains about 30% chlorogenic acids, this works out to a dose of about 60 mg of chlorogenic acids daily. Another study used 140 mg of purified chlorogenic acids daily.
GCBE is thought to be a safe substance. In human trials, no significant adverse effects have been seen.
In theory, the caffeine content of GCBE could potentially cause problems for some people. However, since GCBE contains only about 10% caffeine by weight, a high daily dose contains no more than about 20% of the caffeine content of a strong cup of coffee.
Maximum safe doses in pregnant or nursing women, young children, or people with liver or kidney disease have not been established.
7. Ranheim T, Halvorsen B. Coffee consumption and human health--beneficial or detrimental?--Mechanisms for effects of coffee consumption on different risk factors for cardiovascular disease and type 2 diabetes mellitus. Mol Nutr Food Res . 2005;49:274-84
Last reviewed April 2009 by EBSCO CAM Review Board
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