What is chlorogenic acid? It is a product naturally found in unroasted coffee beans that has a couple of effects. First, it inhibits the release of glucose in the body. Glucose is a form of simple sugar in the bloodstream that the body uses for energy, but too much is a very bad thing. The acid also helps boost a person's metabolism and jump-starts the fat burning process in a person's liver. These two effects together help reduce the amount of fat a person absorbs into their body and helps eliminate weight gain.
Why not just drink coffee? Well, the roasting process necessary for the brewing of coffee breaks down the useful ingredient in the coffee bean. In addition, prepared coffee has around 180mg of caffeine per cup, whereas the green coffee bean extract only has around 20mg per serving. In fact, the caffeine plays little part in the process that makes green coffee bean extract work. Most dietary supplements have natural or artificial stimulants in them, but this extract has less caffeine than two ounces of coffee.
An independent study in America found that overweight men and women lost, on average, seventeen pounds in twenty two weeks while taking this supplement. The important thing to note about this is that the people were told not to change their lifestyle at all for the duration of the test.
In lieu of the fact that there are many positive side effects, there really aren't any serious negative side effects to watch out for. It is recommended that pregnant and nursing mothers avoid taking this product, but as far as everyone else, there are no noted side effects. It does contain trace amounts of caffeine, so people that are very sensitive to caffeine may want to take caution as the side effects typically associated with caffeine can be present. Considering this supplement only has the caffeine of a quarter of a cup of coffee at most, however, the side effects of the caffeine may not be bad enough to even notice.