摘要:TEE area assigned to me in this perspective view of public health in the United States is that of nutrition, the science devoted to the understanding of what we eat, and why. Now in this perspective, of approximately the last 50 years, there is a particular appropriateness in assessing this period when we come to talk about nutrition, for this period roughly corresponds to a vast change in our outlook on this science. Around the turn of the century the science of nutrition had drifted into an almost static state, and since then it has undergone a tremendous change with a marked impact on the public health of the United States-indeed, of the world. As I shall try to show, there is a chance that this dynamic aspect is losing its momentum, but there is no denying that an important change did occur in these 50 years and I think it will be worthwhile to have a good hard look at it.