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Green Coffee Bean Extract


Green coffee beans(GCB) are coffee beans that have not yet been roasted. The roasting process of coffee beans reduces amounts of the chemical chlorogenic acid, Therefore, green coffee beans have a higher level of chlorogenic acid compared to regular, roasted coffee beans. Thanks to the chlorogenic acids, green coffee extract is gaining popularity as a novel ingredient for weight management products.


Chlorogenic acids 45%~70%

Custom water extraction

Custom decaffeination

Total chlorogenic acids:

Chlorogenic acid (CGA) is a hydroxycinnamate, a family of naturally occurring organic compounds. These are esters of cinnamic acids (caffeic acid, ferulic acid and p-coumaric acid) and (-)-quinic acid. Chlorogenic acids are the compounds of esters formed between quinic acid and certain trans-cinnamic acids, most commonly caffeic, ferulic and p-coumaric. Chlorogenic acids are found in plants but green coffee bean is remarkably rich, up to approximately 10% on dry basis, which including at least 45 chlorogenic acids that are not acylated at Clof the quinic acid moiety


1  3-CQA: 3-O-caffeoylquinic acid

2  5-CQA: 5-O-caffeoylquinic acid

3  4-CQA: 4-O-caffeoylquinic acid

4  5-FQA: 5-O-feruloylquinic acid

5  3,4-diCQA: 3.4-di-O-caffeoylquinic acid

6  3,5-diCQA: 3.5-di-O-caffeoylquinic acid

7  4,5-diCQA: 4,5-di-O-caffeoylquinic acid

Graph 1. Component breakdown by HPLC


Graph 2. Structure of 5-O-caffeoylquinic acid (5-CQA)

Solvent residue:

To obtain high levels of chlorogenic acids, several organic solvents could be employed for the extraction of green coffee bean extract. To secure a safe product for its customers, Skyherb uses only food grade, Kosher-certified ethanol.

Table 1. Organic solvent residue, Skyherb’s GCB extract


Possible adulterants:

As a family of phenolic acid, chlorogenic acids could be found in a wide range of plant sources, including some traditional herbal medicine.

Table 2. Plant sources for chlorogenic acids*



WU W, KANG Z, OUYANG D. ZHOU Hong-hao (Institute of Clinical Pharmacology, Central South University, Changsha 410078, China); Progresses in the Pharmacology of Chlorogenic Acid[J]. Natural Product Research and Development, 2006, 4.

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