Most helpful critical review
68 of 76 people found the following review helpful
on July 18, 2012
Chlorogenic acid, the active ingredient in green coffee extract, looks mildly promising for the millions of people who feel desperate to lose weight. There is one published study in humans, involving only sixteen subjects. This is a very small study, absurdly small, really. It was presented at a conference and has not been published in a peer-reviewed scientific journal. Doubtlessly, other studies are underway.
Pharmaceutical companies fund most research on new medicines and drugs, and these companies are only interested in multi-billion dollar profits from drugs that can be patented. If this were a drug that could be patented by a pharmaceutical company, believe me, the industry would be very excited about it. Chlorogenic is a naturally-occurring substance that can't be patented, so high quality research will emerge slowly.
You can read about chlorogenic acid at scienceDaily.com. Just search for "green coffee." There's a Wikipedia article on chlorogenic acid. Based on mouse and test-tube studies, it seems mildly promising. However, most promising supplements turn out to be worthless in the long run. You might remember chromium picolinate. Many millions of dollars worth were sold, on the basis of a few test-tube studies. It's probably worthless.
The weight loss benefits of green coffee extract, if any, don't seem to have anything to do with caffeine, even though it's extracted from coffee beans, among other sources. Chlorogenic acid is apparently not a stimulant.
Vitamin and supplement manufacturers have known for a long time that consumers are willing to pay about $20 per month for their products. Most of the green coffee extracts turn out to cost about $20 per month if you take 1600 milligrams per day, the amount recommended by "experts" based on the one very small study on humans. You've got to do the arithmetic. Number of pills per bottle, dose per pill, cost per bottle. Most green coffee extract works out to around $20 per month, as this brand does, assuming the price doesn't change (about $20 as of this review). Don't pay more than that. If you can find it cheaper from a reputable manufacturer, that might be tempting. If you lose even a few pounds per month, $20 per month is well worth it.
One year later -- I took this stuff as suggested every day for two months. No weight loss. Your mileage my vary. I haven't met anybody who has lost weight on this product, and I haven't noticed fewer fat people on the street lately. Chances are, it's worthless.