The chemistry of chlorogenic acid from green coffee and its role in attenuation of obesity and diabetes.

An overview of green coffee, the unroasted bean enriched with antioxidants, is presented in the
following article. Green coffee beans are known to have a higher content of chlorogenic acid
(CGA) with potential health benefits like activity against hypertension, diabetes, obesity, etc. There
are three major classes of chlorogenic acids present in green coffee beans, namely: caffeoylquinic
acid (CQA), di-caffeoylquinic acid (diCQA) and feruloylquinic acid (FQA). Another pivotal component of the green beans is caffeic acid. A compilation of the different research studies and reviews
pertaining to the diverse biomolecules present in the green coffee, their structure and the different sources of CGA is presented. The traditional and modern methods of the extraction of CGA
are also studied. Green coffee upon roasting develops its aromatic characteristics but the flavor
development comes with a reciprocation of reduced chlorogenic acid content. Thus, the effect of
processing is also addressed. There are numerous studies conducted to show the health benefits
associated with the consumption of green coffee out of which, anti-diabetic and anti-obesity
effects are particularly concentrated in this article.