Ground coffee, caffeinated or decaffeinated, or black tea lowers the risk of diabetes

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Wednesday, June 01, 2005 8:23 am Email this article
Ground caffeinated coffee, ground decaffeinated coffee, and regular black tea, all reduce the risk of diabetes in non-elderly adults who had previously lost weight according to a new study from Brooklyn College of the City University of New York in Brooklyn, New York. Ground caffeinated coffee, 2 cups per day: 14% reduced risk

People who consumed two cups of ground caffeinated coffee were 14 percent less likely to develop diabetes.

Ground decaffeinated coffee, 2 cups per day: 42% reduced risk

People who consumed two cups of ground decaffeinated coffee were 42 percent less likely to develop diabetes.

Regular black tea, 2 cups per day: 23% reduced risk

People who consumed two cups of regular black tea were 23 percent less likely to develop diabetes.

Dose-dependent reduction in diabetes risk

The reduction in risk was dose-dependent, meaning that the more they consumed of each beverage, the greater their reduction in risk.

Previous study found coffee reduced risk 29-79% in women

A previous study (Tuomilehto et al, 2004) found that in women coffee reduced the risk of diabetes as follows:

• 0, 1 or 2 cups of coffee per day did not reduce the risk
• 3-4 cups of coffee per day reduced the risk 29 percent
• 5-6 cups of coffee per day reduced the risk 61 percent
• 7-9 cups of coffee per day reduced the risk 61 percent
• 10 cups or more of coffee per day reduced the risk 79 percent

Previous study found coffee reduced risk 27-55% in men

The same study (Tuomilehto et al, 2004) found that in men coffee reduced the risk of diabetes as follows:

• 0, 1 or 2 cups of coffee per day did not reduce the risk
• 3-4 cups of coffee per day reduced the risk 27 percent
• 5-6 cups of coffee per day reduced the risk 30 percent
• 7-9 cups of coffee per day reduced the risk 33 percent
• 10 cups or more of coffee per day reduced the risk 55 percent

Previous study found reduced risk for everyone

“In both sexes combined, the multivariate-adjusted inverse association was significant (P for trend

<.001) and persisted when stratified by younger and older than 50 years; smokers and never smokers; healthy weight, overweight, and obese participants; alcohol drinker and nondrinker; and participants drinking filtered and nonfiltered coffee," Tuomilehto et al (2004) noted.

REFERENCE

Greenberg J, Axen K, Schnoll R, Boozer C. Coffee, tea and diabetes: the role of weight loss and caffeine. Int J Obes Relat Metab Disord. 2005 May 31.

AUTHOR’S CORRESPONDENCE

Department of Health and Nutrition Sciences
Brooklyn College of the City University of New York
Brooklyn, NY, USA

OTHER REFERENCES

Tuomilehto J, Hu G, Bidel S, Lindstrom J, Jousilahti P. Coffee consumption and risk of type 2 diabetes mellitus among middle-aged finnish men and women. JAMA. 2004 Mar 10, 291(10):1213-19.

AUTHOR’S CONTACT INFORMATION

Jaakko Tuomilehto
Department of Epidemiology and Health Promotion
National Public Health Institute
Helsinki, Finland
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