From The New York Times:
The report, from a huge federal study called the Women’s Health Initiative, raises important questions about how much even the most highly motivated people can change their eating habits and whether the relatively small changes that they can make really have a substantial effect on health. The study, of nearly 49,000 women who were randomly assigned to follow a low-fat diet or not, found that the diet did not make a significant difference in development of two cancers or heart disease. Still the study’s results frustrate our primal urge to control our destinies by controlling what we put in our mouths. And when it comes to this urge, it is remarkable how history repeats itself. Over and over again, medical experts and self-styled medical experts have insisted that one diet or another can prevent disease, cure chronic illness and ensure health and longevity. And woe unto those who ignore such dietary precepts.