Study Details: Subjects will come after a 12h overnight fast to the Risk Factor Modification Centre at St. Michael's Hospital immediately prior to commencement of each treatment phase and at weekly intervals during the course of each study period. Prior to the start of the study, subjects will be instructed on details of the study diet protocol. They will also be asked to maintain a constant level of physical activity throughout the course of the study. At all visits, body weight (in kg) will be obtained in indoor clothing, without shoes, and blood pressure will be taken twice in the dominant arm after subjects have been seated for at least 20 minutes. Height (in cm) will be recorded at the first visit. Throughout the study period, subjects will maintain their usual diet, which should be an NCEP step 2 diet (low saturated fat). Subjects will provide a fasting blood sample at week 0 and at weekly periods throughout the study. At weeks 0, and 4 seven-day food records will be collected. Subjects will also be weighed and seated blood pressure will be taken. Breath samples, 24h urine and 4-day fecal collections will be made at the beginning of the study and at the end of each study phase.