Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Diabetes Health Center

Font Size

Coffee, Lower Type 2 Diabetes Risk Tied

But Researchers Aren't Ready to Recommend Coffee for Diabetes Prevention
WebMD Health News

July 5, 2005 -- People who drink coffee regularly may lower their risk of developing type 2 diabetes.

But don't count on a daily jolt of java to fend off diabetes just yet.

The researchers reporting the finding aren't advising coffee as a diabetes prevention method.

They say they found support for the idea that "habitual coffee consumption is associated with a substantially lower risk of type 2 diabetes."

However, more studies are needed, they write in The Journal of the American Medical Association.

Grounds for Research

One of the researchers was Rob M. van Dam, PhD. He works in the nutrition department at Harvard School of Public Health.

He and his colleagues didn't do a new experiment. Instead, they reviewed 15 past studies of coffee and type 2 diabetes.

Nine studies were done over a long time -- six to 20 years. They included a combined total of more than 193,000 people in the U.S. and Europe.

Coffee Findings

People who drank the most coffee had the lowest risk of type 2 diabetes.

They downed at least six or seven cups of coffee per day. They were 35% less likely to develop type 2 diabetes as those who drank less than two cups of coffee daily.

Those who drank four to six cups per day had a 28% lower risk of type 2 diabetes, compared with people who drank the least coffee, say the researchers.

Similar patterns were seen in six other studies. Those were one-time-only checks; they didn't track diabetes risk over time. More than 17,000 people took part in those projects.

Filtered, Instant, Decaf Brews

Been in a coffee shop lately? If so, you've seen the array of coffee styles.

If coffee has some advantage against diabetes, does it matter what kind you drink?

The findings mainly reflect consumption of drip-filtered coffee. The studies didn't have as many drinkers of instant or unfiltered coffees, say the researchers.

What about decaf coffee? The European studies didn't distinguish between caffeinated and decaf coffee and diabetes risk.

But decaf coffee was associated with lower type 2 diabetes risk in two U.S. studies, say the researchers.

Today on WebMD

Diabetic tools
Symptoms, diagnosis, treatment, and more.
woman flexing muscles
10 strength training exercises.
Blood sugar test
12 practical tips.
Tom Hanks
Stars living with type 1 or type 2.
kenneth fujioka, md
Can Vinegar Treat Diabetes
Middle aged person
Home Healthcare

Prediabetes How to Prevent Type 2 Diabetes
type 2 diabetes
food fitness planner