Study Details: Subjects came after a 12h overnight fast to the Risk Factor Modification Center at St. Michael's Hospital (Toronto) immediately prior to commencement of each study and at weekly intervals during the course of each study period. Prior to the start of the study, subjects were instructed on details of the study diet protocol. They were also asked to maintain a constant level of physical activity throughout the course of the study. At all visits, body weight (in kg) was obtained in indoor clothing, without shoes.