Green coffee
"Green coffee" beans are coffee seeds (beans) of Coffea fruits that have not yet been roasted. The roasting process reduces amounts of a chemical called chlorogenic acid. Therefore, green coffee beans have a higher level of chlorogenic acid compared to regular, roasted coffee beans. Chlorogenic acid in green coffee is thought to have health benefits.
Green coffee became popular for weight loss after it was mentioned on the Dr. Oz show in 2012. The Dr. Oz show referred to it as "The green coffee bean that burns fat fast" and claims that no exercise or diet is needed.
People take green coffee for obesity, diabetes, high blood pressure, and other conditions but there is no good scientific evidence to support most of these uses.
How does it work?
Green coffee beans are coffee beans that have not yet been roasted. These coffee beans contain a higher amount of the chemical chlorogenic acid. This chemical is thought to have health benefits. For high blood pressure it might affect blood vessels so that blood pressure is reduced.
For weight loss, chlorogenic acid in green coffee is thought to affect how the body handles blood sugar and metabolism.
Possibly Effective for
Obesity. Taking green coffee extract for 8-12 weeks seems to reduce weight by about 2 kg in overweight or obese adults.
Insufficient Evidence for
High cholesterol. Early research suggests that drinking a beverage with both green and roasted coffee for 8 weeks can reduce cholesterol levels in people with high cholesterol.
High blood pressure. Early research suggests that taking green coffee extract for up to 12 weeks modestly reduces blood pressure in adults with mild high blood pressure.
Alzheimer disease.
Type 2 diabetes.
More evidence is needed to rate green coffee for these uses.
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