Green coffee bean extract basically comes from raw, unroasted green coffee beans. At present, with numerous studies proving its promising health benefits, it is normally consumed only as an extract because it does not taste as good as standard black coffee. Even though it is already causing quite a stir in the medical world, the majority of the research which have been done on green coffee extracts remain controversial, with critics questioning the manner in which these studies were conducted. There are, however, a substantial number of verified studies, which show clear proof of its positive effects on general health. Side effects of this supplement are primarily caused by its caffeine content, and they include anxiety, disruption in blood sugar levels, IBS (irritable bowel syndrome), diarrhea, high blood pressure, glaucoma, as well as unsafe levels of homocysteine which can cause heart disease due to its chlorogenic acid content. Some participants in certain studies conducted on green coffee extracts have also complained of headaches and bladder problems.
Green Coffee Bean Extract Benefits
1. Aids in weight loss.
One of the most controversial claims of proponents of green coffee extract is its ability to aid a person to lose weight, without relying too much on diet and exercise. This claim has a strong backing in a study that was conducted in January 2012, where human volunteers exhibited considerable decreases in body mass index, body fat percentage, and overall body weight after 22 weeks. The key component responsible for such a positive result is the green coffee extract's chlorogenic acid content, the intake of which has been proven to improve and boost metabolism significantly. Nonetheless, many experts still think that further research is needed to establish this alleged benefit.
2. Can prevent a sudden increase in blood sugar levels.
While diabetics may still have to be wary of this, the capability of chlorogenic acid to inhibit carbohydrate absorption, and, in turn, prevent abnormal surges in blood sugar levels shows a lot of promise in the fight against diabetes. Chlorogenic acid, again, plays a major role in this, as it has been shown to slow down the transport of glucose in the body. Coupled with trigonelline, it has also been proven to retard glucose and insulin responses, which could lower the risk of acquiring Type 2 diabetes.
3. Serves as a potent antioxidant.
Considered as types of polyphenol, antioxidants in caffeine like caffeic acid chlorogenic acid also aid in the elimination of free radicals in the body. In the study conducted, caffeic acid was the one that exhibited more antioxidant capabilities, but both play a major role, as caffeic acid is only produced when chlorogenic acid breaks down during metabolism.
4. Can lower blood pressure.
Based on two separate studies done on both rats and humans in 2002 and 2006 respectively, sufficient evidence was gathered which confirm the link between chlorogenic acid and a lowered blood pressure. Although, it is important to stress that this effect was only achieved by patients with mild hypertension, who took part in the said studies and achieved desirable results. Nonetheless, since humans are involved in the research, this can be considered as a big step towards the reduction, if not the complete elimination, of hypertension cases worldwide. Again, despite these proven benefits, users are still advised to be extra cautious of possible caffeine side effects (all of which have already been cited above) and are advised to refrain from consuming if they show any signs of being allergic to the said component.