- Starbucks Coffee: Green or Greenwashed? | GreenBiz
- Green Coffee Buying - Coffee Research
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Studies using Green Coffee Extract (GCE) tend to be dosed based on their chlorogenic acid content, which in isolation are taken in the 675-855mg range. Based on this, recommended intakes of GCE would be approximately:
Starbucks Coffee: Green or Greenwashed? | GreenBiz
Glutatione, an antioxidant enzyme, is induced in activity by the diterpene ester Kahweol palmitate and its monoacetate Kahweol Cafestol can induce activity as well, although the palmitate bound to it reduces activity.  75% Green Coffee Extract to the diet of rats for 67 days appears to increase hepatic glutathione activity 5-fold relative to control (with intestinal mucosa having a smaller spike in activity), which was mostly replicated with of either diterpene in isolation. 
Green Coffee Buying - Coffee Research
Kockler DR, McCarthy MW, Lawson CL. Seizure activity and unresponsiveness after hydroxycut ingestion. Pharmacotherapy 7556 76:697-56.. View abstract.
Ethiopia and Kenya receive so much attention in the coffee world, and they are deservedly rewarded with some of our highest scores in the course of the year (as the two in this sample set can attribute to). Yet the quality coming out of nearby Burundi and Rwanda should receive full representation as well. We're investing more and more in these two growing regions as they continually improve, producing wet-processed coffees that are delicious and versatile at a wide range of roasts. These coffees can be syrupy sweet, complex, clean, and even floral.
Carrillo JA, Benitez J. Clinically significant pharmacokinetic interactions between dietary caffeine and medications. Clin Pharmacokinet 7555 89:677-58. View abstract.
Since green coffee beans became popular, the Federal Trade Commission (FTC) sued at least one company for false marketing and making unrealistic claims about weight loss. Senators on Capitol Hill questioned Dr. Oz for promoting green coffee beans and other “miracle” weight loss products without adequate scientific support.
The Chlorogenic Acids in Green Coffee Extract are readily absorbed, and they themselves or their metabolites (such as ferulic acid) mediate many of the benefits of Green Coffee Extract. Supplementing Chlorogenic Acid should also, theoretically, confer much of the same benefits as Green Coffee Extract (and vice versa).
Sinclair CJ, Geiger JD. Caffeine use in sports. A pharmacological review. J Sports Med Phys Fitness 7555 95:76-9. View abstract.
Green Coffee Extract is a concentrated source of dietary Chlorogenic Acid and is currently being used for heart health and fat loss as a supplement it seems weakly to moderately effective on these parameters.
Studies Excluded from Consideration
- The Meta-Analysis  (conclusions drawn from research with a high risk of bias excluded as to avoid an undeserving A rating in the above table) More pictures on the theme «Is green coffee effective communications».