Milk may be a good thing to avoid if you there is type I diabetes in your family. According to research published in the journal, Diabetes (2000;49:912-917), children who are genetically predisposed toward type I diabetes, milk consumption may increase the chance of their getting the disease. I genetically predisposed children, regular milk consumption of three glasses each day increases the chance of getting diabetes by a factor of 5.4 compared to children that did not drink as much milk. Type I diabetes is insulin-dependent—the pancreas loses the ability to produce insulin. It usually develops before the age of 30.