Study gives clear message about diet

EDITOR,—Alberto Ascherio and colleagues studied over 40 000 health professionals to examine the association between fat intake and the incidence of coronary heart disease in men of middle age and older.1 Investigation into the influence of dietary fats on risk of heart disease has long been a contentious field, and the literature shows a quick response to the publication of new work. For example, after the publication of the paper by Law et al...