Since the fi rst edition was prepared more than 5 years ago, a lot of the large data sets found in that edition have been placed on the web. The reader will note that far more web addresses are given in this edition than in the fi rst edition. By deleting some of the large tables that are now on the web, we then had space to expand this reference text to include a more extensive coverage of basic nutrition concepts.
Thus, the reader will note that the book has been reorganized. Part I contains fi ve chapters relating to food. In this section there are web addresses for food composition as well as a broad treatment of food safety, food labeling, and computerized nutrient analysis systems and techniques available for such data analysis. Part II focuses on nutrition as a science. Basic terminology, intermediary metabolism relevant to the use of nutrients, individual micronutrients, as well as nutrient–nutrient interactions can be found here. In addition, there is a chapter giving web addresses for the nutrient needs of species other than the human. This is particularly useful to the scientists wishing to make interspecies comparisons.
Nutrition need throughout the life cycle and under special circumstances is the focus of Part III. Nutrition during pregnancy and lactation, feeding the preterm and term infant, the toddler, the young child, the adolescent, the healthy adult, and the senior adult is addressed in the chapters of this section. How exercise affects nutrient need and how one can have a healthy well-nourished body consuming a vegetarian diet is also discussed in this section.