Benefits, weight loss and side effects

We include products that we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Here is our process.

Green coffee is growing in popularity in the health and wellness community.

As such, you may have heard of its rich supply of plant compounds that are beneficial for health.

This article takes an in-depth look at green coffee, including its potential benefits and risks.

Green coffee beans are simply ordinary coffee beans that have not been roasted and stay completely raw.

Their extract is popular as a dietary supplement, but green coffee can also be purchased as whole beans and used to make a hot drink, much like roasted coffee.

Keep in mind that a cup of this light green drink won’t taste like the roasted coffee you’re used to, as it has a much milder flavor. They say it tastes more like herbal tea than coffee.

In addition, its chemical profile is quite different from that of roasted coffee, although their origins are similar.

It enjoys an abundant supply of chlorogenic acids – compounds with potent antioxidant and anti-inflammatory effects that may provide numerous health benefits (1).

Roasted coffee products also contain small amounts of chlorogenic acid, but most of it is lost during the roasting process (2).


Green coffee beans are raw, unroasted coffee beans. They contain high levels of a group of antioxidants called chlorogenic acids, which are believed to provide many benefits.

In 2012, green coffee extract was touted as a wonder weight loss supplement by acclaimed American doctor and talk show host Dr. Oz.

Many health experts have since refuted the idea that it has a significant impact on weight.

Despite this, green coffee extract remains one of the most popular weight loss supplements on the market.

Several small studies have treated mice with the extract and found that it significantly reduced overall body weight and fat build-up. However, studies in humans have been much less conclusive (3, 4).

Most human research on green coffee has not been conclusive. While some participants lost weight, the studies were poorly designed with small sample sizes and short durations (5).

Thus, there is no definitive proof that green coffee is effective for weight loss. Larger and well-designed human studies are needed.


Green coffee is marketed as a weight loss aid, but scientific evidence to support its effectiveness is lacking. More human research is needed.

Green coffee may have health benefits other than weight loss.

In fact, its chlorogenic acids may help lower your risk of chronic diseases like diabetes and heart disease (6).

In an 8-week study, 50 people with metabolic syndrome – a set of risk factors including high blood pressure and blood sugar that increase the risk of diabetes and heart disease – took 400 mg of grain extract of decaffeinated green coffee twice a day (7).

Those who took the extract experienced significant improvements in fasting blood sugar, blood pressure, and waist circumference, compared to a control group.

While these results are promising, larger studies are needed.


Green coffee may lower your risk of heart disease and type 2 diabetes, although more research is needed.

Green coffee is largely safe but can present several potential risks (5).

Effects of excess caffeine

Just like roasted coffee, green coffee beans naturally contain caffeine.

While moderate caffeine consumption is probably safe for most healthy people, excessive consumption could lead to negative symptoms, such as anxiety, trouble sleeping, and increased blood pressure (8).

One cup (8 ounces) of black or green coffee provides approximately 100 mg of caffeine, depending on the variety and brewing method (8).

Since a small amount of caffeine can be lost during the roasting process, green coffee may contain a little more caffeine than black, but the difference is probably negligible (2).

Meanwhile, green coffee supplements typically offer 20 to 50 mg per capsule, although some are decaffeinated during treatment.

If you take green coffee in any form, you may want to moderate your intake to avoid the effects.

May affect bone health

A 2-month animal study found that mice given daily doses of green coffee extract had significant calcium depletion in their bone tissue (9).

These results suggest that long-term consumption of green coffee supplements may adversely affect bone health.

That said, human research is needed.


Overconsumption of caffeine in green coffee could cause negative symptoms. Additionally, early animal research suggests it can harm bone health, although human studies are needed.

There is insufficient data on green coffee to establish clear dosage recommendations.

That said, at least one study used doses of up to 400 mg of green coffee extract twice daily, reporting no negative effects (7).

If you are planning to take this extract, consult your health care provider to make sure that you are taking a safe amount.


No clear dosage recommendations have been established for green coffee, but some studies have safely used doses of up to 400 mg of extract twice daily.

Green coffee refers to the raw beans of the coffee tree.

Its extract has been popularized as a weight loss supplement, and it can promote healthy blood sugar and blood pressure levels, although research on its effectiveness is limited.

Few side effects have been reported, but its caffeine content can cause side effects.

If you are considering adding green coffee to your routine, check with your health care provider to make sure it is safe for you.

You can also use whole grains to make a hot drink.

If you want to try green coffee or its extract, you can buy it locally or find whole beans and supplements online.

About Jeffery L. Parker

Check Also

For the benefits of coffee, it doesn’t matter whether it’s caffeinated or decaffeinated | Lifestyles

DEAR DR. ROACH: I switched from drinking caffeinated coffee to Swiss Water Decaf about two …

Leave a Reply

Your email address will not be published.