A 2011 review in Gastroenterology Research and Practice found green coffee bean extract to lower body weight more significantly than a placebo in three studies. Although average weight loss (about 5.5 pounds) was moderate (perhaps because the doses were a modest 180 to 200 mg/day), researchers noted the poor quality of the studies and suggested more research before recommending the extract for weight loss. While the extract appears safe, ingesting too much chlorogenic acid may raise the risk of heart disease since it elevates levels of the amino acid, homocysteine. In general, it’s recommended that adult coffee drinkers stick to a moderate amount a day, about 3 or 4 cups, or 300 to 400 mgs of caffeine.
If you desire a chemical intervention such as green coffee bean extract to boost your metabolism, be sure to ask yourself these questions:
- How much should you take?
- What happens once you stop taking the extract? Will metabolism revert back to its natural “set-point”? (This is the point where your body naturally will fall.)
- How much are you willing to increase your activity level?