A family history of diabetes puts you at increased risk, but so does just being over age 45. The disease is also more common among Alaska natives, Asian-Americans, Pacific Islanders, Hispanics/Latinos, Native Americans and African-Americans. Even if you're in one of these high-risk groups, you can protect yourself by striving for a healthy lifestyle and seeing your doctor regularly for screenings. A recent study found that participants who ate well (a diet rich in fruits and veggies, whole grains, olive oil and nuts) reduced their chances of getting diabetes by nearly 83%. "The key to preventing the development of insulin resistance seems to be a diet rich in fiber," says Miguel Martinez-Gonzalez, M.D., Ph.D., study author and chair of the department of preventive medicine and public health at the University of Navarra in Pamplona, Spain.