*Diet assessment methodologies *Strategies for diet modification *Clinical status of herbals, botanicals, and modified food products *Preventing common diseases such as cardiovascular disease, diabetes, osteoporosis,and breast cancer through nutrition *Importance of genetic factors *Understanding of cultural and socio-economic influences on eating and exercise behaviors and integrating that knowledge with biological or functional markers of disease This reference addresses basic principles and concepts that are central to the major clinical nutrition-related activities, such as nutritional assessment and monitoring, current theoretical base and knowledge of efficacious interventions, interactions between genetic and nutritional factors, and the use and interpretation of population-based or clinical epidemiological evidence. Author Biography: Ann Coulston, American Dietetic Association Cheryl Rock, University of California, San Diego, U.S.A. Elaine Monsen, University of Washington, Seattle, U.S.A.