Updated: 12/05/2017
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Green coffee bean is one of the most talked by ingredients in the world of dietary supplements.

Millions of people strive to lose extra pounds and improve their health. However, are natural green coffee beans the answer? [1]

Let’s take a closer look at green coffee bean; it’s uses and benefits to health.

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green coffee bean

What is Green Coffee Bean?

To begin with, green coffee beans are mainly raw or unroasted coffee seeds [2]. They are green in hue, and only turn brown after being roasted [36].

Unlike roasted coffee seeds, green coffee beans contain a chemical called chlorogenic acid [3] [4] [34] [35] [37] [38]. This substance is destroyed when the beans are roasted [36].

Chlorogenic acids are phenolic compounds [37] [38], and they are highly bioavailable in humans [3] [30] [31]. They may have a positive impact on blood vessels and damaging free radicals [1] [34] [35].

Some research has suggested that chlorogenic acids have both anti-inflammatory and antioxidant properties [3] [4] [30] [31] [34] [35] [37] [38] [40] [46].

To Sum It Up: Green coffee bean is a natural extract found in unroasted coffee seeds. They possess a chemical removed with the roasting of coffee beans.

green coffee bean

Where to Get Green Coffee Bean

Green coffee bean extract is only found in unroasted coffee seeds.

Over-the-counter supplements use this ingredient. Sometimes, it’s the only active component, or a part of a blend.

Typically, green coffee bean products promote weight-loss [5] [6] [24] [47] [49] [50]. These supplements provide anywhere from 200 to 800 milligrams of green coffee bean extract per serving.

There are also some health supplements that contain this key component.

The majority are found online and in health food shops or supplements stores.

To Sum It Up: The primary place you will find green coffee bean extract is in dietary supplements for either weight management [24] [47] [49] [50] or health [46].

How Much Green Coffee Bean to Take

If you intend to take a green coffee bean supplement, it’s helpful to know how much of this substance is needed to make a real impact on your weight or health [46].

Some research shows that taking 50-140 milligrams of chlorogenic acids every day for at least four weeks could help reduce blood pressure [1] [48].

Another study revealed that taking 400 milligrams of green coffee bean extract a day could aid with weight reduction [7] [27] [47] [49] [50].

To Sum It Up: It’s a bit unclear how much green coffee bean extract is needed. However, it appears that anywhere from 50-400 milligrams per day could be effective in some people trying to lower blood pressure or lose weight.

Green coffee bean weight loss

Green Coffee Bean and Weight-Loss

The primary reason people use green coffee bean supplements is for weight-loss [5] [6] [7] [24] [47] [49] [50]. It’s one of various plant extracts touted for fat loss and weight management at this point.

To start with, the chlorogenic acid in this bean is the key component. After all, it has been shown in some studies to help fight obesity [8] [1] [27].

More specifically, chlorogenic acids could potentially slow down the release of sugar or glucose into the bloodstream [9]. This could help prevent fat storage or weight gain. Moreover, it may help with type 2 diabetes [9].

However, other research has suggested that green coffee bean is a tad overrated. Some studies have shown that this ingredient only leads to modest weight-loss results [10].

To Sum It Up: Some early studies have suggested that this natural extract could help with fat loss and weight management [5] [6] [7] [8] [47] [49] [50]. However, more research is likely needed to determine just how effective green coffee bean is for treating obesity.

How much green coffee bean extract?

Benefits of Green Coffee Bean Benefits

There is research that says green coffee bean helps reduce blood pressure [28] [29] [41] [45] [48], which may be due to its anti-inflammatory effects.

A Japanese study revealed that the chlorogenic acid in this bean extract could help broaden blood vessels, which in turn lowers systolic pressure by 5-10mmHg [1] [11] [12]. This study involved adults taking 50-140 milligrams each day for 4-12 consecutive weeks.

Furthermore, some small and controlled clinical trials from 2011 to 2012 demonstrated that taking one gram of chlorogenic acid [37] [38] from green coffee bean extract could result in both weight-loss and reduced blood pressure [48]. It also helped reduce the production of glucose in the liver [13].

To Sum It Up: Some studies have suggested that the chlorogenic acids [37] [38] in green coffee bean extract may have anti-inflammatory effects, which help lower blood pressure to some degree, at least in individuals with high blood pressure [25] [41] [45] [48].

Additional Green Coffee Bean Benefits

Additional health benefits of taking a green coffee bean supplement may include treating conditions such as Alzheimer’s disease and type 2 diabetes [42] [43] [44].

Since this bean extract contains some caffeine [about 20 milligrams in 200mg], which associates it with Alzheimer’s disease. As you may be aware, caffeine [32] [33] is a stimulant and has shown some promise for treating memory loss [14] [15] [16].

Some epidemiologic studies involving mice showed that caffeine could have a therapeutic effect against Alzheimer’s disease [17]. It assisted by lowering brain plasma Abeta levels. The results could mean a promising treatment for humans as well.

Type 2 diabetes is another health condition that may be treated by this bean extract since some clinical research has revealed that chlorogenic acids could influence blood glucose levels [18].

One study in India showed that green coffee supplements could lower blood glucose levels in normal-weight participants [18].

Another study involving 12 healthy participants revealed that chlorogenic acid could reduce the blood’s absorption of glucose by up to 6.9 percent [19].

To Sum It Up: Green coffee bean supplements may help boost memory in those with diseases such as Alzheimer’s, and it may also reduce blood glucose levels to minimize the effects of type 2 diabetes [20] [26] [42] [43] [44].

Green coffee bean research

Research Involving Green Coffee Bean

Yes, there have been some human clinical studies conducted with green coffee bean. These studies involve people dealing with obesity, high blood pressure [39] [41] [45] [48], type 2 diabetes [42] [43] [44] and memory loss [46].

For instance, some research has suggested that chlorogenic acid ccould help reduce body mass index and percent body fat. A 22-week study of 16 overweight adults showed that 1,050 milligrams of green coffee bean extract taken for six weeks could lower BMI 2.92 percent [21].

Another study involving 30 healthy adults from age 18-40 concluded that green coffee bean supplements could boost cognitive performance, lower blood glucose levels and minimize blood pressure [22] [26] [28] [29] [39] [41] [45] [48].

On the other hand, some weight-loss studies [27] [47] [49] [50] involving this ingredient are inconclusive.

Research published in Diabetes Metabolic Syndrome and Obesity back in 2012 was uncertain. This study included 16 overweight individuals ages 22-46. It lasted for 22 weeks, but different participants were administered different doses of green coffee bean extract. This led to confusion regarding the results [23].

To Sum It Up: Green coffee bean appears to offer some benefits when it comes to reducing blood glucose levels, lowering blood pressure [41] [45] and treating obesity, but more human clinical studies are required.

Food Addiction

Green Coffee Bean Side Effects

There are some potential side effects caused by green coffee bean [1] [2]. This is certainly not out of the ordinary, seeing how many herbal ingredients could cause some adverse reactions in certain individuals.

Potential adverse effects resulting from green coffee bean extract include nausea, insomnia, anxiety, restlessness, headache, rapid heartbeat and upset stomach [2]. Some people even experience digestive issues [1]. Keep in mind that this substance does contain some caffeine [32] [33]. The risk of side effects increases with too much of this ingredient.

To Sum It Up: Although certain side effects are possible while taking a green coffee bean supplement, they are less likely to occur if you stick to 400 milligrams a day or less, and are not sensitive to caffeine.

The Bottom Line on Green Coffee Bean

It’s clear that green coffee bean does have some potential as a health supplement and weight-loss aid.

However, more human clinical studies are needed to gain a full understanding of how this herb works in regards to weight-loss and treating conditions such as Alzheimer’s, high blood pressure [41] and type 2 diabetes.

In the end, it’s wise to consult your doctor before taking a green coffee bean supplement to treat a health problem.

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Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

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