New study suggests that whole-fat dairy products generally shunned by health experts contain a fatty acid that may lower the risk of type 2 diabetes.

The fatty acid is called trans-palmitoleic acid, according to the study in the Dec. 21 issue of the Annals of Internal Medicine, and people with the highest blood levels of this fatty acid decrease their odds of diabetes by 62 percent compared to those with the lowest blood levels of it.

In addition, "people who had higher levels of this fatty acid had better cholesterol and triglyceride levels, lower insulin resistance and lower levels of inflammatory markers," said research author Dr. Dariush Mozaffarian, co-director of the program in cardiovascular epidemiology at Brigham and Women's Hospital and Harvard School of Public Health.