The fourth edition builds upon this solid foundation with a number of exciting updates. Two breakthrough USDA guidelines-Dietary Guidelines for Americans 2005 and the MyPyramid Food Guidance System-are discussed and analyzed in-depth in the first half of the book. New MyPyramid logo boxes spotlight critical information as it pertains to chapter content in the basic nutrition chapters. Another new feature box the Personal Perspective supplements the teaching points in each chapter with firsthand accounts from a variety of people representing various life stages and professions on the ways that nutrition affects their daily lives. In addition, a new third author brings a fresh perspective and years of experience in clinical nursing and patient education to The Nursing Approach boxes. Rounding out the fourth edition’s offerings are two new ancillary elements virtual case studies and chapter-by-chapter PowerPoint presentations to enhance teaching and learning both inside and outside the classroom.