By Ansley Hill, RD, LD on September 18, 2019 — Medically reviewed by Adda Bjarnadottir, MS, RDN (Ice)

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Green coffee is increasingly common in the health & wellness community.

As such, you may have heard about its rich supply of health-promoting plant compounds.

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


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What is green coffee?
Green coffee beans are simply regular coffee beans that haven’t been roasted & remain completely raw.

Their extract is popular as a dietary supplement, but green coffee can also be purchased in whole-bean form và used to lớn make a hot beverage, much like roasted coffee.

Bear in mind that a mug of this light green drink will not taste lượt thích the roasted coffee you’re used to, as it has a much milder flavor. It’s said lớn taste more like herbal tea than coffee.

What’s more, its chemical profile is quite different than that of roasted coffee, though their origins are similar.

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

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

Summary

Green coffee beans are raw, unroasted coffee beans. They contain high levels of a group of antioxidants known as chlorogenic acids, which are thought to lớn provide numerous benefits.


Does it work as a weight loss supplement?

In 2012, green coffee extract was promoted as a miracle weight loss supplement by American celebrity physician & talk-show host Dr. Oz.

Many health experts have since refuted the notion that it has any significant impact on weight.

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

Several small studies have treated mice with the extract và found that it reduced total toàn thân weight and fat accumulation significantly. However, studies in humans have been far less conclusive (3, 4).

Most human research on green coffee has been inconclusive. While some participants lost weight, the studies were poorly designed with small sample sizes and short durations (5).

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

Summary

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

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May reduce your risk of some chronic diseases

Green coffee may have health benefits other than weight loss.

In fact, its chlorogenic acids may help reduce your risk for chronic diseases lượt thích diabetes và heart disease (6).

In an 8-week study, 50 people with metabolic syndrome — a cluster of risk factors, including high blood pressure & blood sugar, that increase your risk for diabetes and heart disease — took 400 mg of decaffeinated green coffee bean extract twice daily (7).

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

Although these results are promising, larger studies are needed.

Summary

Green coffee may reduce your risk for heart disease và type 2 diabetes, though more research is needed.


Green coffee is largely safe but may have several potential risks (5).

Effects of excess caffeine

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

Although moderate caffeine intake is likely safe for most healthy people, too much could lead khổng lồ negative symptoms, such as anxiety, sleep disturbances, & increased blood pressure (8).

One cup (8 ounces) of either đen or green coffee provides roughly 100 mg of caffeine, depending on the variety và brewing method (8).

Because a small amount of caffeine may be lost during the roasting process, green coffee may contain slightly more caffeine than đen — but the difference is likely negligible (2).

Meanwhile, green coffee supplements usually offer 20–50 mg per capsule, though some are decaffeinated during processing.

If you’re taking green coffee in any form, you may want to moderate your intake lớn avoid effects.

May affect bone health

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

These results suggest that long-term intake of green coffee supplements may harm bone health.

That said, human research is needed.

Summary

Overconsumption of caffeine in green coffee could cause negative symptoms. Furthermore, early research in animals suggests it may harm bone health, though human studies are necessary.


Green coffee refers khổng lồ the raw beans of the coffee plant.

Its extract was popularized as a weight loss supplement, & it may promote healthy blood sugar và blood pressure levels, though research on its effectiveness is limited.

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

If you’re considering adding green coffee to your routine, consult your healthcare provider lớn make sure it’s safe for you.

You can also use the whole beans khổng lồ make a hot beverage.

If you’re interested in trying green coffee or its extract, you can siêu thị for it locally or find whole beans và supplements online.