Green Coffee Bean: Is it Safe and Advantageous?


How much do we know about the green coffee bean? Lately, the green coffee bean has been in the media spotlight, whether in a good or bad context. Many articles have been written about its benefits.

Exactly what are the advantages of green coffee bean?

As you probably know, “green coffee bean” is the term for unroasted (immature) coffee beans. We are used to seeing mature coffee beans, that are brown to yellow color, and we mostly use these beans in our everyday lives. To obtain coffee beans, the green beans are processed by wet or dry ways to get rid of the outer pulp. When immature, the coffee beans have non-volatile and volatile compounds (such as caffeine) that deter insects and animals from eating them.

These compounds give that recognizable flavor of the coffee we all know. The main compound in green coffee bean is chlorogenic acid, the compound responsible for fat reduction and other advantages of green coffee bean.

Coffee green extract has been sold as a nutritional supplement, and has been studied and researched for its contribution to weight loss, among other benefits.

How beneficial is green coffee bean?

According to research, green coffee bean can lower blood pressure. In 2005, a study published in the Journal of Hypertension Research found out that water-soluble green coffee bean extract significantly reduced mild hypertension in both diastolic and systolic blood pressure. Another study in 2007 demonstrated that green coffee is superior to roasted coffee in reducing blood pressure, due to its lower level of a by-product of the roasting process.

More studies have shown that green coffee bean is effective for detoxification, and that it has liver-regenerating properties.

Researchers were also interested to learn whether green coffee bean has the same benefits on mood as roasted coffee. Research published in 2012 in the journal Psychopharmacology, concluded that decaffeinated coffee enriched with chlorogenic acid positively affects the mood and cognition in healthy elderly people.

Numerous studies have been conducted to conclude whether or not green coffee bean is effective for weight reduction and metabolism. The studies were focused on concluding the benefits of chlorogenic acid.

In the scholarly journal Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy, a study that was published in 2012 showed the benefits for weight loss and stronger metabolism. In the study, the participants were consuming different doses of green coffee bean extract supplement (a high dose of supplement (1050mg) for two weeks, a low dose (700mg) for two weeks, and a placebo for two weeks). The research also included a two-week period when participants weren’t consuming any of the three supplements. Even though there were no modifications in diets, the extract showed significant reduction in body weight, body mass index, body fat percent, and even decrease in heart rate (smaller).

“The results are consistent with human and animal studies and a meta-analysis of the efficacy of green coffee extract in weight loss. The results suggest that GCA may be an effective nutraceutical in reducing weight in preobese adults, and may be an inexpensive means of preventing obesity in overweight adults”, the analysis concluded.

In the study, the researchers also determined that because chlorogenic acid enhances the absorption of glucose which in turn offsets insulin resistance and blood sugar elevations that are associated with type 2 diabetes. This is one more confirmation that chlorogenic acid has anti-diabetic properties.

In 2007, research published in “The Journal of International Medical Research”, discovered that participants who consumed instant coffee enriched with chlorogenic acid, lost weight due to decreased absorption of glucose sugar.

In a study that was presented at the National Meeting & Exposition of the American Chemical Society in 2012, the scientists presented outcomes of another study that confirmed the benefits of green coffee bean. A group of overweight people consumed a fraction of an ounce of ground green coffee bean daily and lost about 10 percent of their body weight.

In the study, 16 overweight people aged 22-26 took capsules of extract for 22 weeks and lost an average of 17 pounds in that time.

“Based on our results, taking multiple capsules of green coffee extract a day – while eating a low-fat, healthful diet and exercising regularly – appears to be a safe, effective, inexpensive way to lose weight,” said Joe Vinson from the University of Scranton in Pennsylvania.

The benefits of the green coffee bean result from chlorogenic acid that affects the sugar absorption from starch and influence fat synthesis in the body.

So, should you take a green coffee extract?

The benefits of green coffee bean have been verified many times, and yes, the extract is beneficial in numerous ways. However, many green coffee bean extract products often contain levels of green coffee bean extract that is distinct from what is on the label, and sometimes have additional compounds that may be harmful.

Green coffee bean extract is made of green seeds inside a bright red berry. To create green coffee bean extract, the seeds are left unroasted, soaked and then concentrated to create the extract.

When coffee seeds are roasted, their antioxidant levels increase, however, chlorogenic acid decreases. This compound, by blocking fat accumulation, helps with weight reduction and regulates post-meal blood sugar levels. The extract is converted into a capsule form before being sold to consumers.

Green-Fu’s proportions of Green Coffee Bean Extract (a.k.a Green Chlorogenic Acid/GCA/Svetol), Magical Plant Proteins, Vitamins, and Essential Minerals, makes this today’s most exciting Weight Loss and Fat Burning Solution.

Kazuya Kozuma, Shigemi Tsuchiya, Jun Kohori, Tadashi Hase, Ichiro Tokimitsu. Antihypertensive effect of green coffee bean extract on mildly hypertensive subjects. Hypertens Res. 2005 Sep;28(9):711-8.

Tohru Yamaguchi, Akiro Chikama, Kenta Mori, Takuya Watanabe, Yasushi Shioya, Yoshihisa Katsuragi, Ichiro Tokimitsu. Hydroxyhydroquinone-free coffee: a double-blind, randomized controlled dose-response study of blood pressure. Nutr Metab Cardiovasc Dis. 2008 Jul;18(6):408-14. Epub 2007 Oct 22.

L. L. Gershbein, K. Baburao. Effect of feeding coffee and its lipids on regenerating and intact liverRes Commun Chem Pathol Pharmacol. 1980 Jun ;28(3):457-72.

L. K. Lam, V. L. Sparnins, L. W. WattenbergIsolation and identification of kahweol palmitate and cafestol palmitate as active constituents of green coffee beans that enhance glutathione S-transferase activity in the mouse. Cancer Res. 1982 Apr ;42(4):1193-8.

L. W. Wattenberg. Inhibition of neoplasia by minor dietary constituentsCancer Res. 1983 May ;43(5 Suppl):2448s-2453s.

J. A. Vinson, B. R. Burnham, Mysore V Nagendran. Randomized, double-blind, placebo-controlled, linear dose, crossover study to evaluate the efficacy and safety of a green coffee bean extract in overweight subjectsDiabetes Metab Syndr Obes. 2012 ;5:21-7. Epub 2012 Jan 18.

New evidence on effects of green coffee beans in weight loss. ScienceDaily. ScienceDaily, 27 March 2012. American Chemical Society (ACS).


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s