Category Archives: Dosage

Green Coffee Bean Extract: The Right Dosage

dosageGreen coffee beans become regular coffee beans after undergoing a process of cleaning, drying, and being ground.  The use of green coffee bean extract as a weight loss supplement has garnered a lot of attention since being promoted by Dr. Oz on television in 2012.

There is no recognized standard dosage of green coffee bean extract, but there are a range of recommendations from medical professionals, manufacturers, and weight loss specialists.


Green coffee bean extract can be purchased in a variety of potencies.  The higher milligram count (and higher cost) products contain 800 mg per capsule.  Because the chlorogenic acids contained in the extract are intended to inhibit the production of body fat, some dosage recommendations call for higher concentrations twice daily, rather than lower concentrations three times a day.  The consensus seems to be that the extract should contain chlorogenic acids in the range of 45% to 50% and have no added caffeine.

The claim of green coffee bean extract advocates is that the chlorogenic acids contained in the extract naturally prevent glucose production in the blood while eating away at fat reserves.

The Studies

The Dr. Oz show tested the effects of green coffee bean extract as a weight loss supplement in 2012.  For this study, 100 women were selected to participate – none were pregnant or suffering from any medical problems.  The dosage instructions given to half of these women were to take 400 milligrams three times a day, before meals (1200 mg daily).  The other half of the group received placebos with the same instructions.  The participants were further instructed not to change their diets, although simply being aware that they were participating in a weight loss study may have affected their dietary habits.

The results of the Dr. Oz study were that those taking the supplement lost an average of 2 pounds over a two week period, whereas the placebo group lost an average of one pound.

A study published by the Journal of Diabetes, Metabolic Syndrome and Obesity in 2012 involved sixteen adult participants who used green coffee bean extract supplement for a twelve week period.  The dosages given to each participant were either 700 or 1050 milligrams per day.

The results of the Journal’s study were that the participants experienced an average weight loss of eighteen pounds.


Total Daily Dosage (Milligrams)

Dr. Oz’s Study

1,200 mg

Journal of Diabetes, Metabolic Syndrome and Obesity Study – Group A

700 mg

Journal of Diabetes, Metabolic Syndrome and Obesity Study – Group B

1,400 mg


The Manufacturers

Manufacturers of green coffee bean extract have their own recommendations for daily consumption of the extract to achieve weight loss.  For example, VitalMend recommends 800 mg, twice daily.  The higher and more concentrated dosage is supposed to speed the weight loss process.

Almost every manufacturer that came up during my research cited the Oz study as proof of the efficacy of green coffee bean extract  As each manufacturer and merchant pointed to that single study, it began to feel more like hype than a miracle solution.

What Dosage Should You Take?

As with all medications and dietary supplements, it’s advisable to discuss your options with a physician before moving forward.  The dosage recommendations vary by source, so there is no medically accepted standard to guide consumers, although the average range seems to be between 400 mg and 800 mg per dose.

Lastly, consumers should heed the disclaimers found at the bottom of most web sites that sell this supplement.  They contain verbiage like: “The statements herein have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent disease,” and “Consult a physician before consuming green coffee bean extract as one may develop common caffeine related side effects such as nausea, insomnia, nervousness, restlessness, increased heart rate and respiratory rate.”