“Green coffee” beans are coffee seeds (beans) of Coffea fruits that have not yet been roasted. When coffee seeds or “beans” are roasted, their antioxidant levels increase, but one natural substance called chlorogenic acid decreases. This chemical is thought to block fat accumulation, boost weight loss, curb carb absorption, and help regulate post-meal blood sugar levels.
There is currently no study that determines an optimal dosage for green coffee bean extract. However, the studies in the article above used dosages ranging from 120-300 mg of Chlorogenic acid. Depending on the concentration of Chlorogenic acid in your supplement, this can range from a dosage of 240-3000 mg of green coffee bean extract per day.
Green coffee has not been shown to be safe for pregnant or breastfeeding women and should not be consumed by children.
Potential Weight Loss
According to a study published in March 2006 in “BMC Complementary and Alternative Medicine,” daily supplementation of an extract prepared from green coffee beans reduced body fat and body weight in mice, as well as fat composition in the liver. The effect was similar in mice supplemented with isolated chlorogenic acids and caffeine, which suggests that these are the compounds responsible for the effect. Chlorogenic acids found in green coffee can be digested and absorbed by humans, which implies a similar availability as the extract.
Reduction of High Blood Pressure
In addition to its effects on promoting weight loss, chlorogenic acids in green coffee can reduce blood pressure. According to a study published in 2006 in “Clinical and Experimental Hypertension,” patients supplemented with 140 milligrams of green coffee bean extract per day demonstrated reduced blood pressure throughout the study. No side effects were reported, which suggests that green coffee is a safe way to help reduce high blood pressure.
Improved Mood and Cognitive Performance
The caffeine found in green coffee has a positive effect on your mood and brain activity. According to a review published in February 2008 in “Nutrition Bulletin,” several studies have confirmed that caffeine can improve reaction time, vigilance, memory, alertness, focus, fatigue resistance and other factors of cognitive performance. Reviewers found the optimal intake of green coffee to be between 38 to 400 milligrams per day, or between 1/3 cup to four cups of brewed coffee.
Benefits from Antioxidants
Green coffee beans and their derived products contain multiple antioxidants, which are compounds that reduce the effects of cell-damaging free radicals in the body. This preventative function keeps you healthier by reducing the amount of damage and stress your cells can take. According to a study published in July 2004 in the “Journal of Agricultural and Food Chemistry,” chlorogenic acid antioxidants in green coffee beans could prevent the proliferation of four kinds of cancer cells, suggesting green coffee may be useful in preventing some types of cancer.
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