Recent research shows that what you eat, especially while pregnant, can affect not only your children but also your grandchildren. When pregnant rats were fed a fatty diet, both their daughters and granddaughters proved to be at greater risk of breast cancer. In fact, even if the daughters of the first generation of rats ate healthily, their offspring - the 3rd generation - were still at greater risk of disease.
Your diet also influences genetic expression. Even though you may be genetically predisposed to a health problem, you're not necessarily destined to express those genes - unless your current diet and lifestyle turns them on.
Source: New Scientist April 20, 2010
