Many have wondered about another Dr. Oz favorite … green coffee extract. He calls it “the fat burner that works!” Does it?Green coffee beans are those that have not yet been roasted. They contain a higher concentration of the constituent chlorogenic acid. This constituent is thought to be responsible for effects on weight loss.
Unlike raspberry ketone, green coffee extract actually has some evidence of effectiveness. Several clinical trials (citations below) have evaluated two specific forms of green coffee extract – Svetol (Naturex) and GCA (Applied Food Sciences). These trials show that these forms of green coffee extract can potentially reduce weight by up to about 2.5 kg (about 5.5 pounds) after 6-weeks of treatment.
There’s no data, to date, that this lost weight stays off. My guess is that it won’t … that there’s nothing that replaces good nutrition, good exercise, and good sleep for long term weight loss.
Nevertheless, the experts at the Natural Medicines Comprehensive Database tell doctors, “Explain to patients that this evidence is promising, but still somewhat preliminary.” Furthermore, “Green coffee extract appears to be safe and well-tolerated when used short-term.”
- 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. J Int Med Res 2007;35:900-8.
- Dellalibera O, Lemaire B, Lafay S. Svetol, green coffee extract, induces weight loss and increases the lean to fat mass ratio in volunteers with overweight problem. Phytotherapie 2006;4:194-7.
- Vinson JA, Burnham BR, Nagendran MV. Randomized, double-blind, placebo-controlled, linear dose, crossover study to evaluate the efficacy and safety of a green coffee bean extract in overweight subjects. Diabetes Metab Syndr Obes 2012;5:21-7.