These results prompted Oz to conclude that taking green coffee bean extract, in the dosage and manner used for the study, could potentially produce double the weight loss of using food logs alone.
Green Coffee Bean Extract for Weight Loss: Does it work?
Oz tells his viewers that the study results are consistent with the existing research on green coffee bean extract, but what exactly does the research say? The Evidence To date, one meta-analysis looked at the effects of green coffee bean extract in human clinical trials to evaluate its effectiveness. The meta-analysis of these three trials revealed a decrease of almost 5 lbs in body weight for individuals who received green coffee bean extract compared with placebo a moderate effect.
These trials, they noted, were heterogeneous, consisted of very small sample sizes the total number of participants was approximately among the three studies , and short in duration, which makes drawing conclusions about the long-term efficacy of the extract imprudent. The authors also raised concerns regarding green coffee bean extract safety and dosage, as little was reported regarding adverse side effects from taking the supplement, and noted that the type and amount of extract necessary to be effective remains unclear.
Additionally, at least one of the clinical trials included for analysis was associated at least loosely with a pharmaceutical company that markets the extract as a weight-loss product.
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- Green Coffee Bean Extract for Weight Loss: Does it Work? | Image Weight Loss Centers.
- Green Coffee Bean Extract for Weight Loss: Does it Work??
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Since the meta-analysis published in , additional studies have reported success with green coffee bean extract as a weight-loss aid. The research receiving the most widespread attention was a crossover study published in that showed a significant weight loss of approximately 17 lbs—along with a corresponding decrease in body fat 4 percentage points —in 16 overweight subjects taking the extract.
Another study out of Korea found similar results in 23 overweight women, demonstrating a significant reduction in body weight and body fat percentage after eight weeks of green coffee bean extract use compared with a placebo group. Clinical studies continue to be tied to industry funding as well as include small sample sizes, short duration exposure, and varying types and dosages of the extract.
References 1. The use of green coffee extract as a weight loss supplement: a systematic review and meta-analysis of randomized clinical trials. Gastroenterol Res Pract.
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Thom E. The effect of chlorogenic acid enriched coffee on glucose absorption in healthy volunteers and its effect on body mass when used long-term in overweight and obese people.
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J Int Med Res. Randomized, double-blind, placebo-controlled, linear dose, crossover study to evaluate the efficacy and safety of green coffee bean extract in overweight subjects. Diabetes Metab Syndr Obes.
Coffee and cardiovascular disease: In vitro, cellular, animal, and human studies. Pharmacol Res.
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Narita Y, Inouye KJ. Since the episode aired, green coffee bean extract has become one of the most searched terms online.
In a recent small, week study, researchers gave 16 overweight adults low doses of green coffee bean extract mg, twice a day , high doses of the supplement mg, 3 times a day , or a placebo 3 times a day for 6 weeks each with a 2-week break of not taking the pills between sequences. Subjects were encouraged to be physically active, but no dietary changes were recommended. Results of the study, funded by Applied Food Sciences, Inc.
No adverse side effects were noted. Green coffee bean extract contains caffeine, a stimulant linked to weight loss. It also boasts high levels of chlorogenic acid , a polyphenol antioxidant that researchers speculate may promote weight loss by reducing the absorption of fat and glucose in the gut, and lowering insulin levels to improve metabolic function.
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A review in the journal 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. Instead, stick to what we know helps with long-term weight loss: a sustainable, enjoyable diet paired with daily physical activity. Have you tried green coffee bean extract?