Nutritional Supplement

Green Coffee Extract for Weight Control

Also indexed as: Green Coffee Extract, Coffea arabica, Coffea canephora, Green Coffee
Botanical names:
Coffea arabica, Coffea canephora
Common names:
Green coffee bean extract
Coffee

  • Weight Management

    Obesity

    Coffee from roasted coffee beans and green coffee extract have both been shown to support weight loss.
    Obesity
    ×
    Active compounds found in green and roasted coffee beans, such as caffeine, chlorogenic acids (antioxidant polyphenols), and prebiotic fibers, may contribute to beneficial effects on metabolism.10,11,12 A comprehensive review of the research indicates drinking three to four cups of coffee daily has a positive impact on metabolic health and lowers the risk of death from any cause.13 Green coffee beans are thought to have greater potential to support weight loss due to their higher chlorogenic acid content compared to roasted coffee beans. Meta-analyses of 15–16 controlled clinical trials indicate green coffee extract has small weight- and waist circumference-reducing effects in people with overweight and obesity.14,15

  • Heart and Circulatory Health

    Hypertension

    Extracts of green, unroasted coffee that are high in chlorogenic acids might help lower high blood pressure.
    Hypertension
    ×
    Coffee beans contain chlorogenic acids, biologically active polyphenols that appear to have blood pressure–lowering and other positive health effects.16 Since roasting coffee beans may degrade their chlorogenic acids, extracts of green unroasted coffee beans have been investigated for their potential to lower high blood pressure and improve metabolic disturbances.17 A meta-analysis of results from nine clinical trials indicates green coffee bean extract in doses lower than 400 mg per day can reduce high blood pressure.18

  • Blood Sugar and Diabetes Support

    Type 2 Diabetes

    Drinking either regular or decaffeinated coffee has been associated with reduced type 2 diabetes risk in several studies.
    Type 2 Diabetes
    ×
    Preliminary research has identified a correlation between drinking either regular or decaffeinated coffee and reduced risk of type 2 diabetes.19,20,21 Test tube studies suggest that chlorogenic acid, a primary constituent found in coffee and in unroasted green coffee extract, may inhibit glucose production by the liver, which could theoretically lead to lower blood glucose levels.22 An animal study found that green coffee extract also prevented the reduction in insulin sensitivity caused by a high-fat diet.23 A double-blind trial found that healthy people who drank a sweetened coffee beverage containing green coffee extract (providing 400 to 450 mg of chlorogenic acids) had lower blood glucose levels during the following two hours compared to when they drank the same coffee beverage without added green coffee extract.24 However, no trials in people with type 2 diabetes have been performed.
What Are Star Ratings?
×
Reliable and relatively consistent scientific data showing a substantial health benefit.
Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

Our proprietary “Star-Rating” system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.

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Traditional Use (May Not Be Supported by Scientific Studies)

Coffee, in the form of a brew of ground roasted beans, has been a popular stimulating beverage for almost one thousand years. Green coffee beans may have been eaten fresh by African cultures prior to 1000 A.D. Obtaining the stimulating effects of caffeine appears to be the primary reason for coffee consumption throughout history.

References

1. Alonso-Salces RM, Serra F, Reniero F, HĂ©berger K. Botanical and geographical characterization of green coffee (Coffea arabica and Coffea canephora): chemometric evaluation of phenolic and methylxanthine contents. J Agric Food Chem 2009;57:4224-35.

2. Farah A, Monteiro M, Donangelo CM, Lafay S. Chlorogenic acids from green coffee extract are highly bioavailable in humans. J Nutr 2008;138:2309-15.

3. Iwai K, Kishimoto N, Kakino Y, et al. In vitro antioxidative effects and tyrosinase inhibitory activities of seven hydroxycinnamoyl derivatives in green coffee beans. J Agric Food Chem 2004;52:4893-8.

4. Glei M, Kirmse A, Habermann N, et al. Bread enriched with green coffee extract has chemoprotective and antigenotoxic activities in human cells. Nutr Cancer 2006;56:182-92.

5. Del Rio D, Stalmach A, Calani L, Crozier A. Bioavailability of coffee chlorogenic acids and green tea flavan-3-ols. Nutrients 2010;2:820-33 [review].

6. Ochiai R, Jokura H, Suzuki A, et al. Green coffee bean extract improves human vasoreactivity. Hypertens Res 2004;27:731-7.

7. Zhao Y, Wang J, Ballevre O, et al. Antihypertensive effects and mechanisms of chlorogenic acids. Hypertens Res 2012;35:370-4 [review].

8. Cho AS, Jeon SM, Kim MJ, et al. Chlorogenic acid exhibits anti-obesity property and improves lipid metabolism in high-fat diet-induced-obese mice. Food Chem Toxicol 2010;48:937-43.

9. Yamaguchi T, Chikama A, Mori K, et al. Hydroxyhydroquinone-free coffee: a double-blind, randomized controlled dose-response study of blood pressure. Nutr Metab Cardiovasc Dis 2008;18:408-14.

10. de Melo Pereira GV, de Carvalho Neto DP, MagalhĂŁes JĂşnior AI, et al. Chemical composition and health properties of coffee and coffee by-products. Advances in Food and Nutrition Research. 2020;91:65-96

11. Tian T, Freeman S, Corey M, et al. Chemical characterization of potentially prebiotic oligosaccharides in brewed coffee and spent coffee grounds. Journal of Agricultural and Food Chemistry. 2017 Apr;65(13):2784-2792.

12. Mills CE, Tzounis X, Oruna-Concha MJ, et al. In vitro colonic metabolism of coffee and chlorogenic acid results in selective changes in human faecal microbiota growth. The British Journal of Nutrition. 2015 Apr;113(8):1220-7.

13. Poole R, Kennedy OJ, Roderick P, et al. Coffee consumption and health: umbrella review of meta-analyses of multiple health outcomes. BMJ (Clinical research ed.). 2017 11;359:j5024.

14. Gorji Z, Varkaneh HK, Talaei S, et al. The effect of green-coffee extract supplementation on obesity: A systematic review and dose-response meta-analysis of randomized controlled trials. Phytomedicine 2019 Oct;63:153018.

15. Asbaghi O, Sadeghian M, Rahmani S, et al. The effect of green coffee extract supplementation on anthropometric measures in adults: A comprehensive systematic review and dose-response meta-analysis of randomized clinical trials. Complementary Therapies in Medicine. 2020 Jun;51:102424.

16. Naveed M,Hejazi V, Abbas M, et al. Chlorogenic acid (CGA): A pharmacological review and call for further research. Biomed Pharmacother 2018;97:67–74.

17. Pimpley V, Patil S,Srinivasan K, et al. The chemistry of chlorogenic acid from green coffee and its role in attenuation of obesity and diabetes. Prep Biochem Biotechnol 2020;50:969–78.

18. Han B, Nazary-Vannani A, Talaei S, et al. The effect of green coffee extract supplementation on blood pressure: A systematic review and meta-analysis of randomized controlled trials. Phytother Res 2019 Nov;33:2918–26.

19. Reis C, Dorea J, da Costa T. Effects of coffee consumption on glucose metabolism: A systematic review of clinical trials. J Tradit Complement Med 2019;9:184–91.

20. Rebelo I, Casal S. Coffee: A Dietary Intervention on Type 2 Diabetes? Curr Med Chem 2017;24:376–83.

21. Tunnicliffe J, Shearer J. Coffee, glucose homeostasis, and insulin resistance: physiological mechanisms and mediators. Appl Physiol Nutr Metab 2008;33:1290–300.

22. Henry-Vitrac C, Ibarra A, Roller M. Contribution of chlorogenic acids to the inhibition of human hepatic glucose-6-phosphatase activity in vitro by Svetol, a standardized decaffeinated green coffee extract. J Agric Food Chem 2010;58:4141–4.

23. Ho L, Varghese M, Wang J, et al. Dietary supplementation with decaffeinated green coffee improves diet-induced insulin resistance and brain energy metabolism in mice. Nutr Neurosci 2012;15:37–45.

24. 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.

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The information presented by TraceGains is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires December 2024.