Skip to content
My WebMD Sign In, Sign Up

Smoking Cessation Health Center

Font Size

Smoking May Increase Diabetes Risk

Abdominal Fat and Cigarette Toxins May Be the Links With Type 2 Diabetes

WebMD Health News

Sept. 26, 2005 -- Cigarette smokers may be nearly three times more likely to develop type 2 diabetes.

Researchers followed a group of more than 900 adults and found smokers were 2.7 times more likely to develop type 2 diabetes in the next five years than people who had never smoked.

"We've known for years that smoking causes lung cancer and seriously raises the risk for heart disease," researcher Capri Foy, PhD, of Wake Forest University School of Medicine's Department of Public Health Sciences, says in a news release. "These findings suggest another poor health outcome associated with smoking."

Smoking Linked to Type 2 Diabetes

In the study researchers looked at 906 middle-aged adults and calculated how many of them got type 2 diabetes in the following five years.

The results showed that 25% of current smokers developed type 2 diabetes compared with 14% of people who never smoked. This held true even after adjusting for other potential risk factors for diabetes, such as age, being overweight, and waist size.

Researchers say the findings suggest that aside from its other proven health risks, cigarette smoking may by itself increase the chance of developing type 2 diabetes.

The study appears in the October issue of Diabetes Care.

How Smoking Affects Diabetes

"There are several possible mechanisms by which smoking may increase a person's risk for developing diabetes," says Foy. "For instance, higher levels of abdominal fat are associated with increased risk of diabetes, and some studies have shown that smokers tend to have more abdominal fat compared to people who have never smoked."

"Also, many studies have found that increased blood glucose levels, increased insulin levels, and increased blood pressure are all associated with increased risk of diabetes, and active bouts of smoking can produce increases in all three of these factors," says Foy. "What's more, cigarettes contain many poisonous substances along with nicotine, such as cadmium, which has been shown to be associated with diabetes."

Researchers say more studies are now needed to determine precisely how cigarette smoking affects the risk of type 2 diabetes.

Today on WebMD

Smoking and Heart Disease
Ways Smoking Affects Looks
no smoking sign
Woman smoking, close-up

Are You at Risk for Dupuytrens Contracture
Quit Smoking Aids
Lung Cancer Risks Myths and Facts
man with inhaler

Erectile Dysfunction
How To Quit Smoking
person pouring water into mouth
How You Can Control Blood Sugar and Manage Insulin